• Pertaining to or associated with men, or male animals; masculine. [from 16th c.]
  • (figuratively) Of instruments, tools, or connectors: designed to fit into or penetrate a "female" counterpart, as in a connector or pipe fitting. [from 16th c.]
  • Belonging to the masculine (social) gender.
  • (grammar, less common than 'masculine') Masculine; of the masculine grammatical gender.
  • Belonging to the sex which typically has testes, which in humans and most other mammals is typically the one which has XY chromosomes. [from 14th c.]
  • (biology) Inherently characteristic of the male of a species. [from 17th c.]


  • An animal of the sex that has testes.
  • A human member of the masculine sex or gender.
  • One of the male (masculine) sex or gender.
  • A plant of the masculine sex.

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