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Definitions for Backup

[1] a person or thing that supports or reinforces another.
[2] a musician or singer or group of musicians or singers accompanying a soloist: a singer with a three-man backup that plays cello, bass, and guitar.
[3] an overflow or accumulation due to stoppage, malfunctioning, etc.: a sewage backup; a backup of cars at the tollbooth.
[4] a person, plan, device, etc., kept in reserve to serve as a substitute, if needed.
[5] Computers . a copy or duplicate version, especially of a file, program, or entire computer system, retained for use in the event that the original is in some way rendered unusable. a procedure to follow in such an event.
[6] Bowling . a ball that curves in a direction corresponding to the bowling hand of the bowler.
[7] (of a person, plan, device, etc.) held in reserve as a substitute if needed: a backup driver; a backup generator.
[8] performing a secondary or supporting function: A drummer and guitarist are the singer's backup musicians.

Words related to Backup

substitute, alternate, extra

Words nearby Backup

backswimmer, backswing, backsword, backswordman, backtrack, backup, backup light, backward, backward and forward, backward heart failure, backwardation

Origin of Backup

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

Words that may be confused with Backup

back, up, backup

Synonyms for Backup

substitute, alternate, extra