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)