Langimage
English

backout

|back-out|

B2

/ˈbæk.aʊt/

(back out)

withdraw by moving back / pull away

Base FormPlural3rd Person Sing.PastPast ParticiplePresent ParticipleNounAdjective
back outbackoutsbacks outbacked outbacked outbacking outbackoutbacked-out
Etymology
Etymology Information

'backout' derives from the combination of the verb 'back' and the adverb 'out' in modern English; 'back' (motion toward the rear) + 'out' (away from an interior or point).

Historical Evolution

The components come from Old English: 'back' from Old English 'bæc' meaning 'rear' or 'back', and 'out' from Old English 'ūt'. The phrasal verb 'back out' (two words) was used in Middle/Late English in literal senses (to move backwards out of a place) and later developed figurative senses (to withdraw). The one-word noun 'backout' arose later (19th–20th century) as a nominalization.

Meaning Changes

Initially it meant the literal action 'move backward/out' or 'drive out backward'; over time it evolved to commonly mean 'withdraw from a commitment' and, in technical contexts, 'roll back changes'.

Meanings by Part of Speech

Noun 1

an act of withdrawing from an agreement or canceling a planned action; a withdrawal or cancellation.

The sudden backout of a major sponsor disrupted the event.

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Noun 2

in computing or software deployment, a rollback or reversal of changes (undoing a recent update or deployment).

After the update caused errors, a backout was performed to restore the previous version.

Synonyms

rollbackrevert

Antonyms

Verb 1

to withdraw from a commitment, agreement, or promise; to decide not to do something previously agreed.

They threatened to backout of the deal at the last minute.

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Verb 2

to move a vehicle backwards out of a space (driveway, parking spot, etc.).

He had to backout of the narrow driveway slowly.

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Last updated: 2025/12/26 19:18