alpha male

noun
  1. a male animal having the highest rank in a dominance hierarchy: Studies show that in spite of their high rank, access to females, etc., baboon alpha males experience a great deal of stress.
  2. the most dominant, powerful, or assertive man in a particular group: the alpha male of investment bankers.
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British Dictionary definitions for alpha male

alpha male

noun
  1. the dominant male animal or person in a group
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012