backlog

1 of 2

noun

back·​log ˈbak-ˌlȯg How to pronounce backlog (audio)
-ˌläg
Synonyms of backlognext
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
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Noun
The rocket also has a backlog of more than two dozen national security missions awaiting its return to flight. — Richard Tribou, The Orlando Sentinel, 29 June 2026 This indicates the Saudis are clearing a backlog of oil tankers that were unable to exit the Gulf during the conflict, the firm said. — Spencer Kimball, CNBC, 2 July 2026
Verb
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 For the 2024 tax season, Collins urged the IRS to make clearing up its identity theft backlog a higher priority. — Michelle Singletary, Washington Post, 12 Jan. 2024 See All Example Sentences for backlog

Word History

First Known Use

Noun

1684, in the meaning defined at sense 1

Verb

1963, in the meaning defined above

Time Traveler
The first known use of backlog was in 1684

Rhymes for backlog

See All Rhymes for backlog

Browse Nearby Words

back-load
backlog
back loop jump
See all Nearby Words

Cite this Entry

“Backlog.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/backlog. Accessed 7 Jul. 2026.

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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

More from Merriam-Webster on backlog

Thesaurus: All synonyms and antonyms for backlog

Nglish: Translation of backlog for Spanish Speakers

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