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Backup
/bˈækʌp/
/ˈbæˌkəp/
Backup
[NOUN]1
the act of providing assistance or support to someone or something
2
(computing) a copy of computer data that can be used to restore lost or damaged data
synonyms : computer backup
3
a musical part (vocal or instrumental) that supports or provides background for other musical parts
4
someone who takes the place of another (as when things get dangerous or difficult)
Examples
1. The alarm clock has a backup battery in case of a power outage.
2. She's a backup dancer for a famous pop singer.
3. She's joining the pop star's tour as a backup singer.
4. The backup quarterback had to make up for the injured starter and lead the team to victory.
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