noun
an accumulation caused by clogging or a stoppage
Examples
- a traffic backup on the main street
- he discovered a backup in the toilet
noun
someone who takes the place of another (as when things get dangerous or difficult)
Synonyms
Examples
- the star had a stand-in for dangerous scenes
- we need extra employees for summer fill-ins
noun
a musical part (vocal or instrumental) that supports or provides background for other musical parts
Synonyms
noun
(computer science) a copy of a file or directory on a separate storage device
Synonyms
computer backup
Examples
- he made a backup in case the original was accidentally damaged or erased
noun
the act of providing approval and support
Synonyms
Examples
- his vigorous backing of the conservatives got him in trouble with progressives