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ENGLISH THESAURUS & DICTIONARY

backup

noun

Words like backup

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musical accompaniment

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Related words aren’t always interchangeable. Check the definition before you choose.

MEANING & USAGE

Definitions & examples

01noun

an accumulation caused by clogging or a stoppage

“a traffic backup on the main street”

“he discovered a backup in the toilet”

02noun

someone who takes the place of another (as when things get dangerous or difficult)

“the star had a stand-in for dangerous scenes”

“we need extra employees for summer fill-ins”

03noun

a musical part (vocal or instrumental) that supports or provides background for other musical parts

04noun

(computer science) a copy of a file or directory on a separate storage device

“he made a backup in case the original was accidentally damaged or erased”

1 more meanings

05noun

the act of providing approval and support

“his vigorous backing of the conservatives got him in trouble with progressives”

Meanings and examples from Open English WordNet 2025. About our sources ↗

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Expressions with “backup”

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Explore multiword dictionary entries containing this word. Each has its own meanings and related words.

backup man backup file backup woman backup system computer backup