Meaning

noun a gender that refers chiefly (but not exclusively) to males or to objects classified as male

adjective of grammatical gender

adjective associated with men and not with women

originFrom Middle English masculyne, masculyn, from Old French masculin, from Latin masculīnus, diminutive of masculus (“male, manly”), itself a diminutive of mās (“male”). Displaced native Old English werlīċ (literally “manly”).

Etymology from Wiktionary, CC BY-SA 3.0