Trump1  —n. 1 a playing-card of a suit temporarily ranking above the others. B (in pl.) This suit (hearts are trumps). 2 colloq. Generous or loyal person. —v. 1 defeat (a card or its player) with a trump. 2 colloq. Outdo.  come (or turn) up trumps colloq. 1 turn out better than expected. 2 be greatly successful or helpful. Trump up fabricate or invent (an accusation etc.) (trumped-up charge). [corruption of *triumph in the same (now obsolete) sense]