From The Collaborative International Dictionary of English v.0.48:
Trump \Trump\, n. [OE. trumpe, trompe, F. trompe; probably fr. L. triumphare to triumph, to exult, hence, probably, to make a joyous sound or noise. See Triumph, v. i. & n., and cf. Trombone, Tromp, Trump at cards, Trumpery, Trumpet, Trunk a proboscis.] A wind instrument of music; a trumpet, or sound of a trumpet; -- used chiefly in Scripture and poetry. [1913 Webster]
We shall all be changed, in a moment, in the twinkling of an eye, at the last trump. --1 Cor. xv. 51, 52. [1913 Webster]
The wakeful trump of doom. --Milton. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Trump \Trump\, v. i. [imp. & p. p. Trumped; p. pr. & vb. n. Trumping.] To play a trump card when one of another suit has been led. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Trump \Trump\, v. t. To play a trump card upon; to take with a trump card; as, she trumped the first trick. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Trump \Trump\, v. t. [F. tromper to deceive, in OF., to blow a trumpet, se tromper de to mock. See Trump a trumpet.] 1. To trick, or impose on; to deceive. [Obs.] "To trick or trump mankind." --B. Jonson. [1913 Webster]
2. To impose unfairly; to palm off. [1913 Webster]
Authors have been trumped upon us. --C. Leslie. [1913 Webster]
To trump up, to devise; to collect with unfairness; to fabricate; as, to trump up a charge. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Trump \Trump\, v. i. [Cf. OF. tromper. See Trump a trumpet.] To blow a trumpet. [Obs.] --Wyclif (Matt. vi. 2). [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Trump \Trump\, n. [A corruption of triumph, F. triomphe. See Triumph, and cf. Trump a trumpet.] 1. A winning card; one of a particular suit (usually determined by chance for each deal) any card of which takes any card of the other suits. [1913 Webster]
2. An old game with cards, nearly the same as whist; -- called also ruff. --Decker. [1913 Webster]
3. A good fellow; an excellent person. [Slang] [1913 Webster]
Alfred is a trump, I think you say. --Thackeray. [1913 Webster]
To put to one's trumps, or To put on one's trumps, to force to the last expedient, or to the utmost exertion. [1913 Webster]
But when kings come so low as to fawn upon philosophy, which before they neither valued nor understood, it is a sign that fails not, they are then put to their last trump. --Milton. [1913 Webster]
Put the housekeeper to her trumps to accommodate them. --W. Irving. [1913 Webster]