One of the male (masculine) sex or gender.
Belonging to the sex which typically produces sperm, or to the gender which is typically associated with it.
Characteristic of this sex/gender. (Compare masculine, manly.)
Tending to lead to or regulate the development of sexual characteristics typical of this sex.
(grammar, less common than 'masculine') Masculine; of the masculine grammatical gender.
Of instruments, tools, or connectors: designed to fit into or penetrate a female counterpart, as in a connector, pipe fitting or laboratory glassware.