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

Commercial backlog growth slowed to 12% in the first quarter, per Bloomberg, down from 21% in the fourth quarter of 2025. — Michael Khouw, CNBC, 24 July 2026

Boeing said that implementation helped reduce operational backlogs while improving overall workflow efficiency, encouraging broader adoption of the technology. — Aamir Khollam, Interesting Engineering, 23 July 2026

Verb

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

His court date was scheduled for 2027, a date far in the future because of the nation’s immigration courts backlog. — Lawrence Mower, Miami Herald, 26 Aug. 2025

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