The suit of cards with the highest ranking over the other suits in a particular hand
Usage – A card in the trump suit whose trick-taking power is greater than any other suit card.
In bridge the trump suit is determined by highest bid that wins the contract (sometimes called ‘auction’). Trump cards are a set of one or more cards in the deck that, when played, are of higher value than the suit led. If a trick contains any trump cards, it is won by the highest-value trump card played, not the highest-value card of the suit led. There are four suits possible Spades, Hearts, Diamonds and Clubs. It is also possible to play in No-trumps where the is no trump suit and the highest card of the suit first led in each round wins.