Meaning : An accumulation caused by clogging or a stoppage.
Example :
A traffic backup on the main street.
He discovered a backup in the toilet.
Meaning : Someone who takes the place of another (as when things get dangerous or difficult).
Example :
The star had a stand-in for dangerous scenes.
We need extra employees for summer fill-ins.
Synonyms : backup man, fill-in, relief, reliever, stand-in, substitute
Meaning : A musical part (vocal or instrumental) that supports or provides background for other musical parts.
Synonyms : accompaniment, musical accompaniment, support
Meaning : (computer science) a copy of a file or directory on a separate storage device.
Example :
He made a backup in case the original was accidentally damaged or erased.
Synonyms : computer backup
Meaning : The act of providing approval and support.
Example :
His vigorous backing of the conservatives got him in trouble with progressives.
Synonyms : backing, championship, patronage