Definition of flush noun from the Oxford Advanced American Dictionary

     

    flush

     noun
    noun
    NAmE//flʌʃ//
     
     
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  1. 1 [countable, usually singular] a red color that appears on your face or body because you are embarrassed, excited, or hot A pink flush spread over his cheeks.
  2. 2[countable, usually singular] a sudden strong feeling; the hot feeling on your face or body caused by this a flush of anger/embarrassment/enthusiasm/guilt
  3. 3 [singular] the act of cleaning a toilet with a sudden flow of water Give the toilet another flush.
  4. 4 [countable] (in card games) a set of cards that a player has that are all of the same suit see also royal flush
  5. Idioms
    (in) the first flush of something(formal)
     
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    (at) a time when something is new, exciting, and strong in the first flush of youth/enthusiasm/romance
See the Oxford Advanced Learner's Dictionary entry: flush