Definition: an accumulation caused by clogging or a stoppage; "a traffic backup on the main street"; "he discovered a backup in the toilet"
Definition: 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"
Definition: a musical part (vocal or instrumental) that supports or provides background for other musical parts
Definition: (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"
Definition: the act of providing approval and support; "his vigorous backing of the conservatives got him in trouble with progressives"
Definition: A reserve or substitute.
Definition: Misspelling of back up.
Definition: Standby, reserve or extra.