backlog

American  

[bak-lawg, -log] / ˈbækˌlɔg, -ˌlɒg /

noun

1. a reserve or accumulation, as of stock, work, or business.

   a backlog of business orders.

   Synonyms:

   reservoir, cache, fund, store, stock, supply

2. a large log at the back of a hearth to keep up a fire.

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verb (used with object)

backlogged, backlogging

1. to hold in reserve, as for future handling or repair.

2. to enter and acknowledge (an order) for future shipment.

verb (used without object)

backlogged, backlogging

1. to accumulate in a backlog.

   Orders are starting to backlog faster than we can process them.

backlog British  

/ ˈbækˌlɒɡ /

noun

1. an accumulation of uncompleted work, unsold stock, etc, to be dealt with

2. a large log at the back of a fireplace

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Etymology

Origin of backlog

First recorded in 1675–85; back ¹ + log ¹

Example Sentences

When a so-called "risk-adjusted" backlog is totalled up for all NHS buildings in Wales - which focuses on major problems where safety could be at risk - the bill comes to more than £1bn.

From BBC • Apr. 2, 2026

As of the end of last year, Rocket Lab had a $1.85 billion backlog, up 73% from 2024.

From MarketWatch • Mar. 31, 2026

Many shipments are now being canceled before being loaded on ships, creating a backlog, Verloop said.

From Los Angeles Times • Mar. 29, 2026

Equipment maker GE Vernova’s record $150 billion order backlog for power-generating gear at the end of last year is reflected in the shares of the gas-turbine maker, according to industry analysts.

From The Wall Street Journal • Mar. 26, 2026

I don’t even have time to get nervous for the first three and do well, but there’s a backlog at the Block.

From "Mockingjay" by Suzanne Collins

Related Words

• inventory
• stockpile