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 vehicle backward

back up (something)

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

to gradually collect 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 stored separately
(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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    Avoiding common errors with the word enough.
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    by Liz Walter Enough is a very common word, but it is easy to make mistakes with it. You need to be careful about its position in a sentence, and the prepositions or verb patterns that come after it. I’ll start with the position of enough in the sentence. When we use it with a noun,

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