Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

back sb up

phrasal verb with back
 
 
/bæk/ verb

Definition

B2 to support or help someone: My family backed me up throughout the court case.Backing, supporting and defendingDefending and protecting C2 to say that someone is telling the truth: Honestly, that's exactly what happened - Claire will back me up. Will you back me up if I say that I never saw him?Proving and disproving
(Definition of back sb up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of back sb up