In card playing: In some games, to throw aside or reject from the hand, as a card dealt to the player which by the laws of the game is not needed or can be exchanged.In other games, as whist, to throw away on a trick, as a card (not a trump) of a different suit from that led, when one cannot follow suit and cannot or does not wish to trumpTo dismiss, as from service or employment; cast off.To thrust away; reject: as, to discard prejudices.Synonyms To turn away, discharge.In card-playing, to throw cards out of the hand. See I.n. In card-playing: The act of throwing out of the hand such cards as are unnecessary in the game, or of playing, as in whist, a card not a trump of a different suit from that led.n. The card or cards thrown out of the hand.n. Hence One who or that which is cast out or rejected.n. In poker, the pile of cards made up by the hands which are abandoned without being bet upon, and the cards which have been laid off so as to get others in exchange for them.