backup

[ bak-uhp ]
/ ˈbækˌʌp /

noun

adjective

(of a person, plan, device, etc.) held in reserve as a substitute if needed: a backup driver; a backup generator.
performing a secondary or supporting function: A drummer and guitarist are the singer's backup musicians.

Origin of backup

1775–85, Americanism; noun use of verb phrase back up

WORDS THAT MAY BE CONFUSED WITH backup

back up backup

usage note for backup

See login.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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