#1
backup n. an accumulation caused by clogging or a stoppage; "a traffic backup on the main street"; "he discovered a backup in the toilet"
. wn #2
backup n. [
stand-in, substitute, relief, reliever, 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"
. wn #3
backup n. [
accompaniment, musical accompaniment, support] a musical part (vocal or instrumental) that supports or provides background for other musical parts
. wn #4
backup n. [
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"
. wn #5
backup n. [
backing, championship, patronage] the act of providing approval and support; "his vigorous backing of the conservatives got him in trouble with progressives"
. wn