Definition of flush noun from the Oxford Advanced Learner's Dictionary

     

    flush

     noun
    noun
    BrE BrE//flʌʃ//
     
    ; NAmE NAmE//flʌʃ//
     
    Excitement
     
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  1. 1[countable, usually singular] a red colour that appears on your face or body because you are embarrassed, excited or hot A pink flush spread over his cheeks. see also hot flush See related entries: Excitement
  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 a flush.
  4. 4[countable] (in card games) a set of cards that a player has that are all of the same suit a royal flush (= the five highest cards of a suit)
  5. Word Originnoun senses 1 to 3 Middle English (in the sense ‘move rapidly, spring up’, especially of a bird ‘fly up suddenly’): symbolic, fl- frequently beginning words connected with sudden movement; perhaps influenced by flash and blush. noun sense 4 early 16th cent.: from French flux (formerly flus), from Latin fluxus ‘a flow’ (see flux: the use in cards can be compared with English run).Extra examples A flush of embarrassment rose to her cheeks. Hot drinks can cause hot flushes. Hot drinks can cause sweating and hot flushes in the face and head. I’m no longer in the first flush of youth. She felt a dull flush of anger creeping into her face. She had a slight pink flush in her cheeks. The promise in his voice brought a deep flush to her cheeks. There was a faint flush of colour on those pale cheeks. a hectic flush of rising excitement There was an unhealthy flush across his thin face.Idioms
    (in) the first flush of something
     
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    (formal) (at) a time when something is new, exciting and strong in the first flush of youth/enthusiasm/romance
See the Oxford Advanced American Dictionary entry: flush