back up (something) Meaning in the Cambridge English Dictionary Cambridge dictionaries logo
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Meaning of “back up (something)” in the English Dictionary

"back up (something)" in American English

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back up (something)

phrasal verb with back  us   /bæk/ verb
  • (MOVE BACKWARD)

to move ​backward, or to ​drive a ​vehiclebackward

back up (something)

phrasal verb with back  us   /bæk/ verb
  • (GATHER)

to ​graduallycollect or ​gather in one ​place, esp. ​traffic or a ​liquid

back up something

phrasal verb with back  us   /bæk/ verb
  • (MAKE EXTRA COPY)

to make a ​copy of ​information in a ​computer that is ​storedseparately
(Definition of back up (something) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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“back up (something)” in American English

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