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before

 
 
/bɪˈfɔːr/ conjunction

Definition

EARLIER 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.
TO AVOID STH in order to avoid something bad happening: Put that stick down before you hurt someone.
UNTIL until: It took a few moments before I realized that he was lying.
(Definition of before conjunction from the Cambridge Learner's Dictionary © Cambridge University Press)

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