The Collaborative International Dictionary
masculine \mas"cu*line\ (m[a^]s"k[-u]*l[i^]n), a. [L. masculinus, fr. masculus male, manly, dim. of mas a male: cf. F. masculin. See Male masculine.]
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Of the male sex; not female.
Thy masculine children, that is to say, thy sons.
--Chaucer. -
Having the qualities of a man; suitable to, or characteristic of, a man; virile; not feminine or effeminate; strong; robust.
That lady, after her husband's death, held the reins with a masculine energy.
--Hallam. Belonging to males; appropriated to, or used by, males. [R.] ``A masculine church.''
--Fuller.(Gram.) Having the inflections of, or construed with, words pertaining especially to male beings, as distinguished from feminine and neuter. See Gender. -- Mas"cu*line*ly, adv. -- Mas"cu*line*ness, n.
Wiktionary
n. The state or condition of being masculine.