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English definition of “before”

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before

conjunction
 
 
/bɪˈfɔːr/
EARLIER A2 earlier than the time when something happens: He was a teacher before he became famous. It was dark before we found him. Before I could warn him, he had fallen.Before, after and alreadyAfter and behind
TO AVOID STH B1 in order to avoid something bad happening: Put that stick down before you hurt someone.Avoiding actionLaziness and lazy people
UNTIL B1 until: It took a few moments before I realized that he was lying.Until a particular moment
(Definition of before conjunction from the Cambridge Learners Dictionary © Cambridge University Press)
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