Source : Webster's Revised Unabridged Dictionary (1913)

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.

         We shall all be changed, in a moment, in the twinkling
         of an eye, at the last trump.            --1 Cor. xv.
                                                  51, 52.

         The wakeful trump of doom.               --Milton.

Trump \Trump\, v. i. [Cf. OF. tromper. See {Trump} a trumpet.]
   To blow a trumpet. [Obs.] --Wyclif (Matt. vi. 2).

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.

   2. An old game with cards, nearly the same as whist; --
      called also {ruff}. --Decker.

   3. A good fellow; an excellent person. [Slang]

            Alfred is a trump, I think you say.   --Thackeray.

   {To put to one's trumps}, or {To put on one's trumps}, to
      force to the last expedient, or to the utmost exertion.

            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.

            Put the housekeeper to her trumps to accommodate
            them.                                 --W. Irving.

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.

Trump \Trump\, v. t.
   To play a trump card upon; to take with a trump card; as, she
   trumped the first trick.

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.

   2. To impose unfairly; to palm off.

            Authors have been trumped upon us.    --C. Leslie.

   {To trump up}, to devise; to collect with unfairness; to
      fabricate; as, to trump up a charge.

Source : WordNet®

trump
     n 1: a playing card in the suit that has been declared trumps
          [syn: {trump card}]
     2: a brass musical instrument with a brilliant tone; has a
        narrow tube and a flared bell and is played by means of
        valves [syn: {cornet}, {horn}, {trumpet}]

trump
     v 1: produce a sound as if from a trumpet
     2: get the better of; "the goal was to best the competition"
        [syn: {outdo}, {outflank}, {best}, {scoop}]
     3: play a trump [syn: {ruff}]
     4: proclaim or announce with or as if with a fanfare [syn: {trump
        out}]