Definition of alpha male noun from the Oxford Advanced Learner's Dictionary

     

    alpha male

     noun
    noun
    BrE
     
    ; NAmE
     
     
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  1. 1[usually singular] the man or male animal in a particular group who has the most power The alpha male was a large black wolf.
  2. 2a man who tends to take control in social and professional situations Most alpha males need to control the women in their lives.
See the Oxford Advanced American Dictionary entry: alpha male