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Glossary

Warehousing has its own vocabulary, and quotes and contracts don’t stop to explain it. Here are 41 of the terms you’re most likely to run into.

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3PL (third-party logistics): A company that runs logistics activities, such as warehousing, order fulfillment and transportation, on behalf of another business. The client keeps ownership of the goods; the 3PL provides the space, labor and systems. See also Contract warehousing, Public warehouse.
4PL (fourth-party logistics): An organization that manages a client's whole supply chain, including the selection and coordination of several 3PLs and carriers, often without operating warehouses or trucks itself. See also 3PL (third-party logistics).
ABC analysis: A way of ranking products by how much they move or how much they are worth. A items are the small group that accounts for most activity; C items are the long tail. Warehouses use it to place fast movers near the dock and to decide how often to count each item. See also Slotting, Cycle count.
Accessorial charge: A fee for work outside the basic storage, handling or freight rate, such as labeling, repalletizing, overtime, detention, liftgate delivery or extra stops.
Anniversary billing: A storage billing method in which each receipt is charged a month of storage on arrival and again on the same date each following month while any of it remains in the warehouse. See also Split-month billing.
ASN (advance ship notice): An electronic message sent before a shipment arrives, listing what it contains, often down to pallet, carton, lot and quantity. It lets the receiving warehouse plan labor and check the delivery quickly. See also EDI (electronic data interchange), Cross-docking.
Bill of lading (BOL): The document issued for a shipment that serves as a receipt for the goods, describes the freight and sets out the terms of carriage between shipper and carrier. See also Proof of delivery (POD).
Blast freezing: Freezing product rapidly with very cold, fast-moving air before it goes into frozen storage. Fast freezing limits ice crystal growth and helps protect product quality. See also Cold storage.
Bonded warehouse: A warehouse authorized by customs to store imported goods without the payment of duty until the goods are released into the domestic market. Goods re-exported from bond may never pay duty. See also Foreign-trade zone (FTZ).
Clear height: The usable vertical space in a warehouse, measured from the floor to the lowest overhead obstruction such as beams, lights or sprinkler pipes. It determines how high goods can be racked.
Cold chain: The unbroken series of temperature-controlled storage and transport steps that keeps a perishable product within its required temperature range from production to the end user. See also Cold storage, Temperature excursion.
Cold storage: Warehousing in refrigerated or frozen rooms for perishable products such as food, pharmaceuticals and some chemicals. It is usually priced higher than dry storage because the space costs more to build and run. See also Cold chain, Blast freezing.
Contract warehousing: An arrangement in which a 3PL provides dedicated or shared space, labor and systems to a client under a multi-year agreement, often with a fixed management fee plus variable charges. See also Public warehouse, 3PL (third-party logistics).
Cross-docking: Moving goods from inbound to outbound trucks with little or no time in storage, sorting them at the dock by destination. See also ASN (advance ship notice), Transloading.
Cycle count: Counting a small portion of inventory on a rolling schedule, instead of shutting the warehouse for a full physical count. Over a cycle, every location is checked at least once. See also Inventory accuracy, ABC analysis.
Demurrage: A charge for leaving a loaded container at a port or rail terminal beyond the free time allowed. A related charge, detention, applies when equipment is kept outside the terminal too long. See also Detention, Drayage.
Detention: A charge for holding a carrier's truck, trailer or container beyond the agreed free time, for example when a driver waits at a dock for loading. See also Demurrage.
Dock-to-stock time: The time from when goods arrive at the receiving dock until they are put away and available to sell or ship.
Drayage: Short-distance trucking of shipping containers, usually between a port or rail ramp and a nearby warehouse. See also Demurrage, Transloading.
EDI (electronic data interchange): Standardized electronic messages exchanged between trading partners, such as purchase orders, ship notices and invoices. Common standards include ANSI X12 in North America and EDIFACT internationally. See also ASN (advance ship notice).
FEFO (first expired, first out): A stock rotation rule that ships the units with the earliest expiry or best-before date first, regardless of when they arrived. It is standard for food and pharmaceuticals. See also FIFO (first in, first out), Lot tracking.
FIFO (first in, first out): A stock rotation rule that ships the oldest received stock first. For products without expiry dates it limits aging; for dated products FEFO is usually preferred. See also FEFO (first expired, first out).
Foreign-trade zone (FTZ): In the US, a designated area under customs supervision where goods can be stored, processed or assembled with duty deferred, reduced or eliminated depending on where they end up. Similar concepts exist elsewhere as free zones. See also Bonded warehouse.
Freight class: A category used to price LTL shipments in the US under the National Motor Freight Classification. Since July 2025 most items are classed mainly by density. See also LTL (less than truckload).
FTL (full truckload): A shipment that fills or pays for a whole trailer and travels directly from shipper to receiver without terminal transfers. See also LTL (less than truckload).
Handling charge: A charge for the labor of moving goods into and out of a warehouse, often billed once per unit at receipt in public warehousing. See also Anniversary billing, Accessorial charge.
Inventory accuracy: How closely the quantities in the warehouse system match what is physically on the shelves, usually measured by location or by unit during counts. See also Cycle count.
Kitting: Assembling separate items into a single kit or bundle, such as a gift set or a product with accessories, as a value-added warehouse service.
Lot tracking: Recording the production lot or batch number of goods at each movement so that a specific lot can be found, held or recalled. See also FEFO (first expired, first out).
LTL (less than truckload): Shipments too small to fill a trailer, combined with other shippers' freight and moved through a carrier's terminal network. See also FTL (full truckload), Freight class, Pool distribution.
Pick and pack: Selecting items for an order from storage and packing them into a shipping carton, the core activity of e-commerce fulfillment.
Pool distribution: Sending one consolidated truckload to a terminal near the delivery area, where it is broken down into local deliveries. See also LTL (less than truckload), Cross-docking.
Proof of delivery (POD): A signed document or electronic record confirming that a shipment was delivered, with the date, time and any exceptions noted by the receiver. See also Bill of lading (BOL).
Public warehouse: A warehouse that stores goods for any customer at quoted per-unit rates, rather than for a single owner. 'Public' refers to who it serves, not to government ownership. See also Contract warehousing, Warehouse receipt.
Slotting: Deciding where each product is stored in the warehouse, usually putting fast movers close to packing and shipping areas to cut travel time. See also ABC analysis.
Split-month billing: A storage billing method that charges a full month for goods received in the first half of a month and half a month for goods received in the second half. See also Anniversary billing.
Temperature excursion: Any period in which a product is exposed to temperatures outside its specified range. Excursions must be recorded and assessed, and may make a product unusable. See also Cold chain, Temperature mapping.
Temperature mapping: A study that places data loggers throughout a storage area for a period of time to find out how temperature actually varies, including hot and cold spots. See also Temperature excursion.
Transloading: Transferring goods from one container or vehicle to another, commonly from international ocean containers into domestic trailers near a port. See also Drayage, Cross-docking.
Warehouse receipt: A document issued by a warehouse acknowledging goods received for storage. In the US it is a document of title under Article 7 of the Uniform Commercial Code and may be negotiable or non-negotiable. See also Public warehouse.
WMS (warehouse management system): Software that controls warehouse operations, including receiving, put-away, inventory locations, picking, packing, shipping and counts.