backlog

1 of 2

noun

back·​log ˈbak-ˌlȯg 

-ˌläg

1

: a large log at the back of a hearth fire

2

: an accumulation of tasks unperformed or materials not processed

a backlog of court cases

backlog

2 of 2

verb

backlogged; backlogging; backlogs

: accumulate

Examples of backlog in a Sentence

Noun

We have a huge backlog of orders to be filled.

Recent Examples on the Web

Noun

In published updates, the company has attributed service restrictions and pricing changes to demand exceeding capacity, and outlined investments intended to reduce the backlog. — Matthew Tan, CNBC, 7 Nov. 2026

The National Park System has a $24 billion backlog of maintenance projects that have yet to be funded, with major repairs to roads, buildings and water systems being the most costly. — Joe Heim, Washington Post, 7 Nov. 2026

Verb

For instance, applicants from countries such as China and India (registration required) may face lengthier waits due to backlog risks and high demand. — Jill Jones, Forbes.com, 16 Oct. 2026

Many Transportation Security Administration officers have gone unpaid, creating massive security line backlogs at a few major airports, including in Houston. — Dallas Morning News, 9 Mar. 2026

Word History

First Known Use

Noun

1684, in the meaning defined at sense 1

Verb

1963, in the meaning defined above

Rhymes for backlog

• agog
• bulldog
• bullfrog
• eclogue
• eggnog
• groundhog
• hedgehog
• leapfrog
• prolog
• sheepdog
• watchdog
• analog

Kids Definition

backlog

noun

back·​log

-ˌlȯg, 

-ˌläg

1

: a large log at the back of a fire in a fireplace

2

: an accumulation of tasks that have not been finished