back sth up phrasal verb, verb Meaning in the Cambridge Learner’s Dictionary
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Meaning of “back sth up” - Learner’s Dictionary

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 Learner’s Dictionary © Cambridge University Press)
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