American English

Definition of before conjunction from the Oxford Advanced American Dictionary



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  1. 1earlier than the time when Do it before you forget. Did she leave a message before she went? Before I made a decision, I thought carefully about it.
  2. 2until It may be many years before the situation improves. It was some time before I realized the truth.
  3. 3used to warn or threaten someone that something bad could happen Put that away before it gets broken.
  4. 4(formal) rather than I'd die before I apologized!
See the Oxford Advanced Learner's Dictionary entry: before