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Definition of exhaustion noun from the Oxford Advanced American Dictionary

     

    exhaustion

     noun
    noun
    NAmE//ɪɡˈzɔstʃən//
     
    [uncountable]
     
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  1. 1the state of being very tired suffering from physical/mental/nervous exhaustion Her face was gray with exhaustion. see also heat exhaustion
  2. 2(formal) the act of using something until it is completely finished the exhaustion of natural resources
See the Oxford Advanced Learner's Dictionary entry: exhaustion

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