Of a person: having those qualities or characteristics traditionally associated with men as distinguished from women or children; courageous…

Of a person: distinguished by strength and fortitude; full of courage; valiant, valorous. Cf. virtue, n. 4. Obsolete.

Characterized by manly courage and resolution; brave, resolute.

Having the (good or bad) qualities or characteristics associated with men as distinguished from women; befitting a man. Also: having the…

brave.

Originally U.S. That has ‘balls’ (cf. ball, n.1 12b(b)); determined and courageous, plucky, spirited; (also) masculine; virile, aggressive.

Relating to or characteristic of a stud (stud, n.2 7a); attractively muscular or masculine. Also in extended use: powerful; impressive.