Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun backup

5 senses of backup

Sense 1
backup -- (an accumulation caused by clogging or a stoppage; "a traffic backup on the main street"; "he discovered a backup in the toilet")
       => accretion, accumulation -- (an increase by natural growth or addition)

Sense 2
stand-in, substitute, relief, reliever, backup, backup man, fill-in -- (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")
       => peer, equal, match, compeer -- (a person who is of equal standing with another in a group)

Sense 3
accompaniment, musical accompaniment, backup, support -- (a musical part (vocal or instrumental) that supports or provides background for other musical parts)
       => part, voice -- (the melody carried by a particular voice or instrument in polyphonic music; "he tried to sing the tenor part")

Sense 4
backup, computer backup -- ((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")
       => duplicate, duplication -- (a copy that corresponds to an original exactly; "he made a duplicate for the files")

Sense 5
backing, backup, championship, patronage -- (the act of providing approval and support; "his vigorous backing of the conservatives got him in trouble with progressives")
       => blessing, approval, approving -- (the formal act of approving; "he gave the project his blessing"; "his decision merited the approval of any sensible person")