Definition of temperamental adjective from the Oxford Advanced Learner's Dictionary

     

    temperamental

     adjective
    adjective
    BrE BrE//ˌtemprəˈmentl//
     
    ; NAmE NAmE//ˌtemprəˈmentl//
     
    Excitement, Anger
     
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  1. 1(usually disapproving) having a tendency to become angry, excited or upset easily, and to behave in an unreasonable way You never know what to expect with her. She's so temperamental. (figurative) The printer's being temperamental this morning. He’s a temperamental player (= he plays well or badly according to his mood). See related entries: Excitement, Anger
  2. 2connected with somebody’s nature and personality They are firm friends in spite of temperamental differences.
See the Oxford Advanced American Dictionary entry: temperamental