What is a trump card?

Answer 1

In bridge, each person must play a card of the same suit as the first card played. Four cards are played, with the highest card winning the trick.

However, if you have no more cards in the suit that was lead, you may play a trump card and that will win the trick(unless the next player has also run out of the suit that was lead and plays a trump card that is higher than yours).

The trump suit is named by the players who won the bid. Naturally they pick the suit in which they have the most and the highest cards.

They can also choose to play in No Trump.

Answer 2

It depends of what game you are playing as to what a trump card is. It also depends on the deck of cards that you are playing with too