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English definition of “before”

before

preposition, conjunction, adverb [not gradable] (EARLIER)   /bɪˈfɔr, -ˈfoʊr/
at or during a time earlier than (the thing mentioned ): I left early because I wanted to arrive home before dark . Before making up your mind , think about all your options . It was another half hour before (= until) the ambulance finally arrived . Less than a week before, he’d graduated from college . before last Before last means before the most recent : Today is Monday , so the day before last was Saturday .
(Definition of before preposition, conjunction, adverb (EARLIER) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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