alpha male
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Related to alpha male: Omega Male, Type A personality
alpha male
1. The dominant male in the social hierarchy of an animal group. Emerging research on animal groups suggests that alpha males may have more complex roles than previously thought.
2. By extension, a man who asserts dominance socially and professionally, typically by assuming leadership roles and easily acquiring sexual partners. He walks into the room with such confidence that you immediately know he's an alpha male.