Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “back up something”

back up something

verb phrasal verb with back  /bæk/ us  

(MAKE EXTRA COPY)

to make a copy of information in a computer that is stored separately
(Definition of back up something phrasal verb, verb from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of back up something?
Add Cambridge dictionaries to your browser to your website

Word of the Day

sling

to throw or drop something carelessly

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More