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Definitions of backup
  1. noun
    a musical part (vocal or instrumental) that supports or provides background for other musical parts
    type of:
  2. noun
    (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"

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  3. noun
    the act of providing approval and support
  4. noun
    someone who takes the place of another (as when things get dangerous or difficult)
    type of:
  5. noun
    an accumulation caused by clogging or a stoppage
    "a traffic backup on the main street" "he discovered a backup in the toilet"
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