1 the suit (=one of the four types of cards in a set) chosen to have a higher value than the other suits in a particular card game :
Hearts are trumps.
trumps
[plural] also trump American EnglishDGC
Hearts are trumps.2 also trump cardDGC a card from the suit that has been chosen to have a higher value than the other suits in a particular game
3 something that you can do or use in a situation, which gives you an advantage :
They hold all the trump cards (=have things which could give them an advantage).
trump card
They hold all the trump cards (=have things which could give them an advantage).4 to provide what is needed, especially unexpectedly and at the last moment :
Paul came up trumps and managed to borrow a car for us.
come/turn up trumps
Paul came up trumps and managed to borrow a car for us.
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