Meaning

• The suit, in a game of cards, that outranks all others.

  "Diamonds were declared trump(s)."

• A playing card of that suit.

  "He played an even higher trump."

• Something that gives one an advantage, especially one held in reserve.

• An excellent person; a fine fellow, a good egg.

• An old card game, almost identical to whist; the game of ruff.

• A card of the major arcana of the tarot.

Meaning

• To play on (a card of another suit) with a trump.

  "He knew the hand was lost when his ace was trumped."

• To play a trump, or to take a trick with a trump.

• To get the better of, or finesse, a competitor.

• To impose unfairly; to palm off.

• To supersede.

  "In this election, it would seem issues of national security trumped economic issues."

• To outweigh; be stronger, greater, bigger than or in other way superior to.