back sth up phrasal verb, verb - definition in the Learner's Dictionary - Cambridge Dictionaries Online

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English definition of “back sth up”

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back sth up

phrasal verb with back
 
 
/bæk/ verb
PROVE to prove that something is true: [often passive] His claims are backed up by recent research.Backing, supporting and defendingDefending and protecting
COMPUTER B2 to make an extra copy of computer informationComputer concepts
(Definition of back sth up phrasal verb, verb from the Cambridge Learners Dictionary © Cambridge University Press)
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