Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “back sth up”

back sth up

phrasal verb with back     /bæk/ verb [T]
IT to make an extra copy of a computer file, etc.: Don't forget to back up your files at least once a week. Research data and account information were backed up daily.
(Definition of back sth up from the Cambridge Business English Dictionary © Cambridge University Press)
Focus on the pronunciation of back sth up

Definitions of “back sth up” in other dictionaries

Translations of “back sth up”

Word of the Day

neighbourly

friendly or helpful

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