Definition of valve noun from the Oxford Advanced American Dictionary

     

    valve

     noun
    noun
    NAmE//vælv//
     
     
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  1. 1a device for controlling the flow of a liquid or gas, letting it move in one direction only
  2. 2a structure in the heart or in a vein that lets blood flow in one direction only
  3. 3a device in some brass musical instruments for changing the note
See the Oxford Advanced Learner's Dictionary entry: valve

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