American English

Definition of midnight noun from the Oxford Advanced American Dictionary



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  1. 112 o'clock at night They had to leave at midnight. at/on the stroke of midnight/shortly after midnight She heard the clock strike midnight. Let's have a midnight snack tonight (= a small meal in the middle of the night). We have to catch the midnight train.
  2. 2= midnight blue
  3. Idioms
    burn the midnight oil
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    to study or work until late at night
See the Oxford Advanced Learner's Dictionary entry: midnight