The Indispensable Retail Dictionary: A to Z

Retail has its own language, and it’s a dense one. 

At its core, retail definition is simple – the sale of physical products to members of the public, generally in small quantities, for consumption rather than resale. But the retail sector built around that simple idea has developed a genuinely deep vocabulary of its own. 

Online sales penetration in the UK reached roughly 25% of all retail spend by the end of 2025, while physical footfall continues to soften. Fluency in this language isn’t optional. It’s part of running the business well.

This dictionary is built as a reference to bookmark and return to, not a single read-through. It’s for store managers, buyers, merchandisers, e-commerce teams, founders writing a retail store business plan, and anyone newer to the retail business who wants a fast, reliable answer. 

A

Abandoned Cart Rate – The percentage of online shoppers who add items to a basket but leave before completing checkout. A high rate often signals friction in payment, delivery cost, or account creation steps.

Above-the-Fold – The portion of a webpage or app screen visible without scrolling. Retailers prioritise key products, offers, and calls to action here since it gets the most attention.

Advanced Shipping Notice (ASN) – An electronic notification sent by a supplier ahead of a delivery, detailing what’s being shipped and when it will arrive, so retailers can plan receiving and stock.

Affiliate Marketing – A performance-based retail marketing model where third parties earn commission for driving sales through their own referral links or content.

Allocation – The process of distributing stock from a distribution centre to individual stores or channels, based on expected retail demand at each location.

Anchor Store – A large, well-known store (typically a department store) placed within a mall or shopping centre specifically because it draws footfall that benefits the smaller retail outlet businesses around it.

Assortment – The full range of products a retailer stocks within a category or across the business. Assortment decisions directly shape retail sales performance and customer perception of choice.

Assortment Breadth – How many different product categories or lines a retailer carries. A wide breadth means variety across categories; a narrow one signals a more specialised retail strategy.

Assortment Depth – How many individual items a retailer stocks within a single category. Fast-selling categories generally warrant a deeper assortment; slower-turning ones a shallower one.

Attach Rate – The percentage of transactions that include an add-on or complementary product alongside the main purchase – a direct measure of cross-selling effectiveness.

Augmented Reality (AR) Shopping – Retail technology that overlays digital visuals, such as how furniture would look in a room, or a garment on a body, onto a real-world view via smartphone or headset.

Automatic Replenishment – A system that reorders stock automatically once inventory falls below a set threshold, reducing manual stock management and helping prevent out-of-stocks.

Average Order Value (AOV) – The average amount spent per transaction, calculated by dividing total revenue by number of orders. A core lever for retail profits alongside customer volume.

Average Transaction Value (ATV) – Also called Average Transaction Size (ATS), this measures the average spend per purchase in-store, found by dividing total sales for a period by the number of transactions in that period.

B

Backorder – An order for a product that is temporarily out of stock but will be fulfilled once new inventory arrives.

Back of House (BOH) – The non-customer-facing parts of a retail or hospitality operation, like stockrooms, offices, and staff-only areas, as distinct from the customer-facing front of house.

Basket Size – The number of items, or total value, in a single customer transaction. Closely tied to average order value and a key retail analytics metric for merchandising success.

Beacon Technology – Small Bluetooth devices placed in-store that send location-based offers or information to a customer’s smartphone as they move through the retail outlet.

Big-Box Retail – Physically large stores, often minimalist in layout, that stock a wide range of products at competitive retail price points, generally at the cost of lower profit margins.

Bill of Lading (BOL) – A legal document issued by a carrier that details the goods being transported, serving as both a receipt and a contract within the retail supply chain.

BOPIS (Buy Online, Pick Up In Store) – A fulfilment model where customers order online and collect in person, blending retail e-commerce convenience with the immediacy of a physical retail outlet.

BORIS (Buy Online, Return In Store) – The reverse of BOPIS: allowing online purchases to be returned at a physical store, which simplifies retail logistics and improves the retail buyer experience.

Bounce Rate – The percentage of website visitors who leave after viewing only one page — a key signal in retail e-commerce of whether a landing page is engaging visitors effectively.

Brand Equity – The commercial value a brand holds beyond its physical products, built through customer trust, recognition, and loyalty over time.

Break-Even Point – The sales volume at which total revenue equals total costs, after which a retail business starts generating retail profits.

Brick-and-Mortar – A traditional, physical retail outlet, as distinct from an online-only business. Many UK retailers now blend both – a model known as brick-and-click.

Bullwhip Effect – A phenomenon in the retail supply chain where small shifts in customer demand cause increasingly large swings in orders further up the chain, from retailer to wholesaler to manufacturer.

Bundling – Packaging multiple items together for sale as a single unit, typically at a lower combined retail price than buying each separately. This is especially useful for moving slower-selling stock alongside popular items.

Buyer – The retail buyer responsible for selecting, negotiating, and purchasing the products a store or chain will stock, directly shaping retail merchandising and retail inventory decisions.

Buying Cycle – The stages a retail buyer or customer moves through from recognising a need to completing a purchase.

C

Cannibalisation – When a new product, promotion, or store location takes sales away from an existing one within the same retail chain, rather than generating genuinely new demand.

Cash Wrap – The counter area where transactions are completed, including the till, card machine, and bagging space – central to the overall retail customer experience.

Category Captain – A leading supplier a retailer works closely with to manage and optimise an entire product category, often shaping shelf layout and assortment decisions.

Category Killer – A retailer that dominates a specific product category through scale, price, and selection, making it difficult for smaller niche retailing competitors to compete directly.

Category Management – The strategic approach of managing product categories as individual business units, each with its own goals for retail sales and profitability.

Chargeback – A reversed card transaction, typically initiated by a customer’s bank following a dispute, fraud claim, or processing error.

Churn Rate – The percentage of customers who stop buying from a retailer over a given period – a key measure of retail customer retention.

Click-and-Collect – A fulfilment option letting customers order online and pick up in-store, one of the fastest-growing parts of UK retail e-commerce as shoppers look to avoid delivery costs and waits.

Click-Through Rate (CTR) – The percentage of people who click a link or ad after seeing it, a core retail marketing metric for digital campaign performance.

Composable Commerce – A retail technology approach that builds an e-commerce platform from independent, interchangeable components rather than one fixed system, giving retailers more flexibility to adapt.

Comparable Store Sales (Comps) – Also called same-store sales, this compares retail sales at the same locations over matching periods, stripping out the effect of new store openings to reveal genuine retail growth.

Consignment – An arrangement where a retailer displays and sells goods without paying for them upfront; the original supplier is paid a share of the sale price only once the item sells.

Contribution Margin – The revenue remaining after variable costs are deducted from a sale, before fixed costs are considered. This is a useful measure of how much each product contributes to covering overheads.

Conversion Rate – The percentage of visitors, whether in-store or online, who complete a purchase, one of the most closely watched retail analytics figures for any retail business.

Cost of Goods Sold (COGS) – The direct cost of producing or acquiring the products a retailer sells, used to calculate gross margin and overall profitability.

Cost per Acquisition (CPA) – The average marketing spend required to acquire one new customer, a key efficiency metric for retail marketing budgets.

Cross-Docking – A logistics process where incoming deliveries are transferred directly to outbound transport with minimal or no storage in between, speeding up the retail supply chain. See also Cross-Docking (X-Docking).

Cross-Selling – A sales practice that encourages larger purchases by placing related products from different categories together (batteries next to electronics, for example) to boost basket size.

Curbside Pickup – A fulfilment option where staff bring an online order out to a customer’s car, popularised during the pandemic and still used by many UK retailers for convenience.

Customer Acquisition Cost (CAC) – The total cost of gaining a new retail customer, including marketing and sales spend, divided by the number of customers acquired.

Customer Journey – The complete path a customer takes from first discovering a retail business to making a purchase and beyond, spanning both online and in-store touchpoints.

Customer Lifetime Value (CLV) – The total revenue a business can expect from one customer over the full length of their relationship with the retailer.

Customer Relationship Management (CRM) – Software used to track customer interactions, purchase history, and preferences, supporting more personalised retail marketing and service.

Cycle Count – A method of counting a small portion of retail inventory regularly, rather than the entire stock at once, to maintain ongoing inventory accuracy.

D

Dark Store – A retail location closed to walk-in customers and used exclusively to fulfil online orders – common among grocery and quick-commerce retailers.

Days Sales of Inventory (DSI) – The average number of days it takes a retailer to sell through its current stock, a key indicator of inventory efficiency.

Dead Stock – Inventory that has stopped selling and is unlikely to sell at full price, tying up capital and warehouse space.

Demand Forecasting – Predicting future retail demand using historical sales data, seasonality, and market trends to guide purchasing and stock decisions.

Demand Planning – The broader process of aligning inventory, supply chain, and production decisions with forecasted retail demand.

Demographic Segmentation – Dividing a customer base into groups based on characteristics like age, income, or location, to tailor retail marketing more precisely.

Digital Shelf – The online equivalent of physical shelf space – how a product appears and ranks across e-commerce sites, search results, and marketplaces.

Direct Store Delivery (DSD) – A supply model where goods go straight from a supplier to individual stores, bypassing a central distribution centre, common for perishable goods.

Direct-to-Consumer (DTC) – A retail model where a brand sells directly to customers, often online, without going through traditional wholesale or third-party retail chain partners.

Distribution Center (DC) – A large facility used to receive, store, and redistribute inventory to stores or customers across the retail supply chain.

Dropshipping – A fulfilment model where a retailer sells products without holding stock, instead having the supplier ship directly to the customer on the retailer’s behalf.

Dwell Time – The amount of time a customer spends in a specific area of a store or webpage, often used as a signal of engagement in retail analytics.

Dynamic Pricing – Adjusting retail price in real time based on demand, competitor pricing, or inventory levels, common in both e-commerce and travel-adjacent retail.

E

E-commerce – The buying and selling of goods online. UK retail e-commerce accounted for around 25% of total retail spending by late 2025 and continues to shape overall retail strategy.

Economic Order Quantity (EOQ) – A formula used to calculate the ideal order quantity that minimises combined ordering and holding costs.

Electronic Data Interchange (EDI) – The structured digital exchange of business documents between retailers and suppliers, replacing manual paperwork.

Electronic Point of Sale (EPOS) – A computerised system for processing transactions, tracking retail inventory, and generating sales reports at the till – the modern backbone of most retail operations. See also: Point of Sale.

Endcap – The display space at the end of a store aisle, prized in retail merchandising for its high visibility and used for promotions or high-margin products.

Endless Aisle – A retail technology that lets in-store customers order out-of-stock or online-only items via a kiosk or staff device, so a limited physical retail outlet can still offer a full catalogue.

Enterprise Resource Planning (ERP) – Integrated software that manages core business processes in one system, supporting broader retail management.

Everyday Low Pricing (EDLP) – A pricing strategy that keeps retail price consistently low rather than relying on frequent promotions, associated with big-box retail.

Exclusivity Agreement – A contract giving a retailer sole rights to sell a particular product or brand within a defined market or region.

Experiential Retail – A retail strategy that emphasises memorable in-store events, workshops, or interactive elements over pure transactions, designed to deepen customer engagement with retail shopping itself.

F

Facing – The number of units of a single product displayed side-by-side on a shelf, a key detail in planogram design.

Fill Rate – The percentage of customer or store orders fulfilled completely and on time from available retail inventory.

FIFO (First In, First Out) – An inventory management method where the oldest stock is sold or used first, important for perishable or trend-sensitive goods.

First-Party Data – Data a retailer collects directly from its own customers (purchase history, loyalty programme activity, website behaviour)  as opposed to data bought from third parties.

Flash Sale – A short, high-discount promotion, typically running until either time runs out or stock sells through, used to drive a quick spike in retail sales.

Floor Plan – The physical layout of a store, mapping product zones, fixtures, and customer flow to maximise both convenience and retail sales.

Footfall – The number of people entering a store or shopping area. UK high street footfall has faced ongoing pressure in recent years, per BRC-Sensormatic data, making it a closely tracked metric for any physical retail outlet.

Forecast Accuracy – A measure of how closely a retailer’s demand forecast matches actual retail sales, used to refine future demand planning.

Franchise – A business model where an individual or company pays to operate under an established retail chain’s brand, systems, and support.

Free on Board (FOB) – A shipping term defining the point at which responsibility for goods transfers from seller to buyer during transport.

Freight Forwarder – A company that arranges the shipping and logistics of goods on behalf of a retailer, often coordinating multiple carriers and customs processes.

Fulfilment – The complete process of receiving, processing, and delivering a customer order, spanning both online and in-store retail operations.

Fulfilled by Amazon (FBA) – A service where Amazon stores, packs, and ships a third-party seller’s inventory on their behalf.

Full-Price Sell-Through – The percentage of stock sold at its original retail price, without markdown – a strong indicator of accurate buying and pricing decisions.

G

Geofencing – A retail marketing technique that triggers offers or notifications to a customer’s phone when they enter a defined physical area near or inside a store.

Gift Card Breakage – The value of gift cards sold but never redeemed, which retailers can recognise as revenue after a defined period.

GMROI (Gross Margin Return on Investment) – A metric measuring how much gross margin a retailer earns for every pound invested in inventory. This is a core measure of retail profits relative to stock spend.

Gondola – A freestanding shelving unit, usually positioned in the centre of a store aisle, used to display products from multiple categories.

Grey Market – The sale of genuine branded goods through channels not authorised by the manufacturer, often at prices that undercut official retail chain pricing.

Grid Layout – A store floor plan arranged in straight, parallel aisles,  common in supermarkets, designed for shopping efficiency over exploration.

Gross Margin – The difference between retail sales revenue and cost of goods sold, expressed as a percentage – one of the clearest indicators of retail profits.

Gross Merchandise Value (GMV) – The total value of goods sold through a retail platform over a given period, before deducting costs, fees, or returns.

H

Halo Effect – When one strong product or promotion boosts sales of other, related products nearby, even without direct marketing for them.

Hard Goods vs. Soft Goods – Hardlines refer to durable, non-fabric inventory such as electronics or homeware, while softlines cover fabric-based goods such as clothing and textiles.

Headless Commerce – An e-commerce architecture that separates the front-end customer experience from the back-end system managing inventory and orders, giving retailers more flexibility to customise their retail shopping experience.

Heat Map – A visual tool showing where customers spend the most time or attention, used both for in-store movement and website interaction.

Hero SKU – The best-selling or flagship product within a range, often used to anchor retail marketing campaigns.

High-Low Pricing – A pricing strategy that alternates between higher standard prices and deep promotional discounts, as opposed to consistently low pricing.

Holding Cost (Carrying Cost) – The total cost of storing unsold retail inventory, including warehousing, insurance, and capital tied up in stock.

Hyperlocal Retail – A retail strategy focused on serving a very specific, small geographic area, often supported by rapid local delivery.

I

Impressions – The number of times an advert, product listing, or piece of content is displayed to potential customers, regardless of whether they click or engage further.

Impulse Purchase – An unplanned buy, often made near the checkout, driven by convenience, price, or in-the-moment appeal rather than prior intent.

Inbound Logistics – The movement and storage of goods coming into a retail business from suppliers, forming the first stage of the retail supply chain.

Initial Markup (IMU) – The percentage added to the cost of goods to set the original selling price, before any later markdowns.

In-Stock Rate – The percentage of time a product is available for purchase, rather than showing as out-of-stock.

In-Store Analytics – Data collected on customer behaviour within a physical retail outlet ( footfall, dwell time, conversion) used to refine layout and staffing.

Inventory Accuracy – How closely recorded stock levels match the actual physical retail inventory on hand, critical for both online and in-store fulfilment.

Inventory Shrinkage – See Shrinkage.

Inventory Turnover – How many times a retailer sells and replaces its stock over a given period. A 2.5x annual turnover, for example, means stock sells through roughly every five months.

Item Master – The central database record for every product a retailer sells, including SKU, description, pricing, and supplier details.

J

Job Lot – A mixed batch of goods, often surplus or discontinued stock, sold together at a reduced price.

Jobber – An intermediary who buys goods in bulk from manufacturers and resells them to retailers, typically in smaller quantities than a full wholesale order.

Journey Mapping – Visually charting every step of the customer journey to identify friction points and opportunities to improve the retail buyer experience.

Just-in-Time (JIT) Inventory – A stock management approach that orders goods to arrive only as needed, minimising holding costs but requiring precise retail logistics.

K

Kanban – A visual inventory and workflow management system, using cards or signals to trigger restocking only when needed.

Key Performance Indicator (KPI) – A specific, measurable value used to track progress against a retail business goal – conversion rate and footfall are both common KPIs.

Key Value Item (KVI) – A product where customers are highly price-sensitive and price-aware, making it especially important to price competitively.

Keystone Pricing – A pricing method that simply doubles the wholesale cost to set the retail price.

Kitting – Grouping individual components into a single sellable unit or package ahead of time, streamlining both retail merchandising and order fulfilment.

L

Landed Cost – The total cost of a product once it arrives at its destination, including the purchase price, shipping, duties, and insurance.

Last-Mile Delivery – The final leg of a delivery journey, from a local distribution point to the customer’s door, often the most expensive part of retail logistics.

Lead Time – The time between placing an order with a supplier and receiving the goods.

LIFO (Last In, First Out) – An inventory method where the most recently received stock is sold first.

Lift – The measurable increase in sales resulting from a specific promotion, display, or marketing activity.

Line Review – A periodic assessment of a product category’s performance, used to decide what to keep, drop, or add to the assortment.

Livestream Shopping – A retail e-commerce format where products are sold in real time through a live video stream, blending entertainment with direct purchasing.

Logistics – The planning and execution of moving goods through the retail supply chain, from supplier to distribution centre to customer.

Loss Leader – A product priced at or below cost specifically to draw customers into a store, in the hope they’ll purchase other, higher-margin items too.

Loss Prevention – The policies, technology, and processes retailers use to reduce shrinkage from theft, fraud, or error.

Loyalty Program – A structured scheme rewarding repeat customers with points, discounts, or perks, central to relationship retailing and long-term customer retention.

M

Market Basket Analysis – A data technique that identifies which products are frequently bought together, informing cross-selling and store layout decisions.

Markdown – A permanent reduction in a product’s original retail price, typically used to clear slow-moving stock.

Markup – A percentage added on top of a product’s cost price to set its selling price.

Merchandise Financial Planning (MFP) – The process of setting sales, margin, and inventory targets for product categories ahead of a trading period.

Merchandise Hierarchy – The structured classification of products into departments, categories, and sub-categories, used for reporting and planning.

Merchandising – The practice of presenting and promoting products in ways that encourage purchase, spanning everything from planogram design to seasonal displays. See also: Visual Merchandising.

Micro-Fulfillment – Small, automated fulfilment centres located close to customers, often within or near urban stores, to speed up last-mile delivery.

Minimum Advertised Price (MAP) – The lowest price a manufacturer allows retailers to advertise a product for, protecting brand value across a retail chain.

Minimum Order Quantity (MOQ) – The smallest quantity of a product a supplier will accept per order.

Mobile Commerce (M-Commerce) – Retail transactions completed via smartphone or tablet, now a dominant share of overall retail e-commerce.

Multichannel Retail – Selling through more than one channel (physical store, website, marketplace) though not necessarily with those channels integrated with each other. See also: Omnichannel.

Mystery Shopping – A research method where individuals pose as customers to assess service quality, product layout, or store cleanliness, either in person or remotely.

N

Negotiated Terms (Net Terms) – Payment terms agreed between a retailer and supplier, such as “net 30,” meaning payment is due 30 days after invoice.

Net Margin – The percentage of revenue remaining as profit after all costs have been deducted.

Net Promoter Score (NPS) – A customer loyalty metric based on how likely customers are to recommend a retail business to others, scored from -100 to 100.

Net Sales – Total retail sales revenue after deducting returns, discounts, and allowances.

New Product Introduction (NPI) – The structured process of bringing a new product to market, from development through to launch on shelf or online.

Niche Retailing – Offering a narrow, highly specific product range rather than broad general retailing, aimed at a defined and often loyal customer base.

Non-Sellable Inventory – Stock that can’t be sold at any price due to damage, expiry, or regulatory issues.

O

Off-Price Retail – Selling branded goods at a discount, often through surplus, overstock, or last season’s stock from other retailers.

Omnichannel – A retail strategy that fully integrates all sales channels so the customer experience is seamless and consistent across each one.

On-Hand Inventory – The quantity of a product physically available and ready for sale right now.

On-Order Inventory – Stock that has been ordered from a supplier but hasn’t yet arrived.

Open-to-Buy (OTB) – A budgeting tool that calculates how much a retail buyer can still spend on new stock within a given period, based on planned sales and existing inventory.

Order Management System (OMS) – Software that tracks and coordinates orders across channels, from placement through fulfilment and delivery.

Outbound Logistics – The movement of finished goods from a retailer’s storage or distribution centre out to stores or directly to customers.

Out-of-Stock (OOS) – A product that’s currently unavailable for purchase due to depleted inventory, directly affecting retail sales and customer experience.

Overstock – Inventory levels exceeding actual retail demand, tying up capital and often requiring markdown to clear.

P

Peak Season – Periods of significantly higher retail demand, such as the UK’s Golden Quarter running from October to December.

Perpetual Inventory – A system that continuously updates stock records in real time as sales and deliveries happen, rather than relying on periodic manual counts.

Physical Inventory Count – A full, manual count of all stock on hand, typically done periodically to verify system records against reality.

Pick and Pack – The warehouse process of selecting ordered items and preparing them for shipment.

Planogram – A diagram used to plan optimal product placement on shelves or in-store, balancing efficiency with visual appeal to encourage purchases.

Point of Sale (POS) – The system, whether a full setup or a simple card machine, used to process customer transactions. Modern POS systems, like those offered by myPOS, combine payment acceptance with reporting and inventory tools, giving smaller retailers the same visibility larger retail chains have relied on for years.

Pop-Up Shop – A temporary retail outlet, “popping up” in a location for a short, defined period to test a concept or generate short-term buzz.

Pre-Order – Allowing customers to purchase a product ahead of its official release or restock date.

Price Elasticity – How sensitive customer demand is to changes in retail price – highly elastic products see demand shift sharply with price changes, while inelastic ones don’t.

Price Matching – A retailer’s policy of matching a lower price found at a competitor, used to retain price-sensitive customers.

Private Label – Products manufactured for and branded exclusively by a specific retailer, rather than a third-party brand.

Product Information Management (PIM) – A centralised system for managing consistent, accurate product data across all sales channels.

Purchase Order (PO) – A formal document issued by a retailer to a supplier, specifying the products, quantities, and prices being ordered.

Q

Quality Assurance (QA) – Processes used to check that products and services meet defined standards before reaching the customer.

Quantity Discount – A reduced per-unit retail price offered when a customer buys in bulk, incentivising larger purchases.

Queue Management – The systems and processes used to organise and speed up customer waiting lines, whether at checkout or during peak in-store periods.

Quick Response (QR) Replenishment – A supply chain approach that uses real-time sales data to trigger fast, small, frequent stock replenishment rather than large infrequent orders.

QR Code – A scannable two-dimensional barcode, widely used in UK retail for contactless payments, product information, and digital receipts.

Sales Quota – A target sales figure set for an individual, team, or store over a defined period.

R

Rain Check – A retailer’s promise to sell an out-of-stock promotional item at the sale price once it’s back in stock.

Receiving – The process of accepting, checking, and logging incoming deliveries at a store or distribution centre.

Reorder Point – The stock level at which a new order should be placed to avoid running out before the next delivery arrives.

Replenishment – The ongoing process of restocking shelves or warehouses to maintain adequate inventory levels.

Restocking Fee – A charge applied to returned items to cover the cost of processing and returning them to sellable inventory.

Retail Arbitrage – Buying products at a low retail price from one source specifically to resell them elsewhere at a profit.

Retail Media Network – Advertising space sold by a retailer — on its website, app, or in-store screens — to brands wanting to reach its existing customer base.

Retention Rate – The percentage of customers who continue purchasing from a retail business over a given period, the inverse of churn rate.

Return Rate – The percentage of sold items sent back by customers, a key metric particularly for retail e-commerce, where fit and expectation mismatches are common.

Reverse Logistics – The process of managing returns, repairs, and recycling — goods moving backward through the retail supply chain, from customer to retailer or supplier.

RFID (Radio Frequency Identification) – Retail technology using tags and readers to track inventory automatically, improving accuracy across stockrooms and shop floors.

RFM Analysis (Recency, Frequency, Monetary) – A customer segmentation method scoring shoppers by how recently, how often, and how much they buy, used to target retail marketing more precisely.

ROAS (Return on Ad Spend) – A measure of revenue generated for every pound spent on advertising.

Run Rate – A projection of future annual performance based on current, shorter-term sales data.

S

Safety Stock – Extra inventory held beyond expected demand, as a buffer against unexpected spikes or supply delays.

Sales per Square Foot – A productivity measure dividing total retail sales by the store’s selling space, useful for comparing performance across a retail chain.

Same-Store Sales – See Comparable Store Sales.

Seasonality – Predictable fluctuations in retail demand tied to time of year, weather, or cultural events.

Sell-In vs. Sell-Through – Sell-in measures how much stock a retailer buys from a supplier; sell-through measures how much of that stock actually sells to customers.

Sell-Through Rate – The percentage of received inventory that has been sold within a given period.

Shelf Life – The length of time a product remains sellable or usable before quality or safety declines.

Shopper Marketing – Retail marketing specifically designed to influence purchase decisions at the point of shopping, whether in-store or online.

Showrooming – When customers visit a physical retail outlet to examine a product in person before buying it online elsewhere, often at a lower price.

Shrinkage – Inventory losses from theft, employee error, vendor fraud, damage, or administrative mistakes – a persistent cost across the UK retail sector that directly erodes retail profits.

SKU (Stock Keeping Unit) – A unique code identifying a specific product variant, used to track retail inventory at the most granular level.

SKU Rationalisation – Reviewing and reducing an overly broad product range to remove underperforming or redundant SKUs.

Slotting Fee – A fee suppliers pay retailers for prime shelf space or placement.

Social Commerce – Selling products directly through social media platforms, increasingly central to retail e-commerce and customer engagement strategies.

Stockout – See Out-of-Stock.

Subscription Commerce – A retail model where customers pay recurring fees for regular product deliveries or ongoing access.

Supply Chain – See Retail Supply Chain, covered throughout this dictionary – the full network of suppliers, logistics, and processes that get a product from source to customer.

T

Tender Type – The method of payment used in a transaction tracked for reconciliation and reporting.

Third-Party Logistics (3PL) – An external company that manages warehousing, fulfilment, and shipping on a retailer’s behalf.

Touchpoint – Any point of interaction between a customer and a retail business, across the full customer journey.

Trade Promotion – A retail promotion funded jointly, or fully, by a supplier to boost the visibility or sales of their product within a store.

Traffic – The volume of visitors to a store or website – the online equivalent of footfall.

Transfer (Inter-Store) – Moving stock between store locations within the same retail chain to balance inventory against local demand.

Turnover – Depending on context, either total retail sales revenue over a period, or how quickly inventory sells and is replaced. See also: Inventory Turnover.

U

Unified Commerce – An advanced form of omnichannel retail where all sales channels, inventory, and customer data run on a single, connected system in real time.

Unit Cost – The cost to produce or acquire a single unit of a product, before any markup is applied.

Units per Transaction (UPT) – The average number of individual items purchased per transaction, a measure closely tied to basket size and cross-selling success.

Universal Product Code (UPC) – The barcode standard used to identify individual retail products at checkout and throughout the retail supply chain.

Upselling – Encouraging a customer to purchase a higher-value version of a product than they originally intended, distinct from cross-selling but often used alongside it.

User-Generated Content (UGC) – Reviews, photos, or videos created by customers rather than the retailer, increasingly used in retail marketing to build trust.

V

Value-Added Services – Additional retail services offered alongside a core purchase that enhance the retail buyer experience.

Variance – The difference between planned and actual results, whether in sales, inventory, or budget.

Velocity (Sales Velocity) – How quickly a product sells over a given period, informing reorder timing and shelf space allocation.

Vendor Compliance – A supplier’s adherence to a retailer’s agreed standards for packaging, labelling, delivery timing, and documentation.

Vendor Managed Inventory (VMI) – An arrangement where the supplier, rather than the retailer, takes responsibility for monitoring and replenishing stock levels.

Visual Merchandising – The strategic, attractive arrangement and display of products to draw attention and encourage purchase, starting from the store’s exterior and continuing throughout the premises.

Voice Commerce – Making purchases via voice-activated devices, such as smart speakers, an emerging channel within retail e-commerce.

W

Wallet Share – The proportion of a customer’s total spending in a category that goes to one particular retailer, as opposed to competitors.

Warehouse Management System (WMS) – Software that manages and optimises daily warehouse operations, from receiving through to shipping.

Wastage – Product loss due to spoilage, damage, or expiry, particularly relevant for grocery and perishable-goods retailers.

Wave Picking – A warehouse fulfilment method grouping multiple orders together to be picked in a single, efficient batch.

Webrooming – The reverse of showrooming: researching a product online before purchasing it in a physical retail outlet.

Weeks of Supply (WOS) – The number of weeks current inventory is expected to last at the present sales rate.

White Label – A product manufactured by one company but sold under another retailer’s own brand name.

Wholesale – The sale of goods in bulk, typically from manufacturer to retailer, at a lower per-unit price than retail pricing, giving retailers the margin to resell profitably to the end customer.

Working Capital – The funds a retail business has available for day-to-day operations, calculated as current assets minus current liabilities.

X

Cross-Docking (X-Docking) – See Cross-Docking above.

XML Product Feed – A structured data file used to share product information with marketplaces, comparison sites, and advertising platforms.

Customer Experience (CX) – See Customer Journey and Retail Buyer Experience – the overall impression a customer forms across every interaction with a retail business.

Y

Year-over-Year (YoY) – A comparison of performance in the current period against the same period one year earlier, commonly used to track retail sales growth.

Year-to-Date (YTD) – Cumulative performance from the start of the current financial or calendar year up to the present date.

Yield Management – Dynamically adjusting pricing and availability to maximise revenue based on real-time demand, more common in travel retail but increasingly used elsewhere.

Z

Zero-Party Data – Information customers voluntarily and directly share with a retailer, such as preferences or wish lists, as distinct from first-party behavioural data.

Zone Picking – A warehouse fulfilment method where each worker is responsible for picking items from a specific zone only, rather than travelling across the whole facility.

Zone Pricing – Setting different retail prices for the same product across different geographic regions, based on local cost or demand differences.

Retail Vocabulary Keeps Evolving

This dictionary covers the terms that matter most today, but retail vocabulary doesn’t stand still. 

Retail media, zero-party data, and headless commerce were niche concepts a few years ago. Today they shape how much of the retail sector actually operates, and new terms will keep emerging as retail trends around AI, sustainability, and omnichannel fulfilment continue to develop.

Bookmark this page, share it with your team, and return whenever a new term crops up in a meeting or a supplier conversation. 

And if you’re building or refining the systems behind your own retail business, a connected POS platform like myPOS is a practical place to put much of this vocabulary into practice.