In plural. Poker (originally and chiefly U.S.). Cards which entitle the holder to open the betting. Also figurative.

Poker. A high third card retained in the hand with a pair at the draw.

in stud poker, a card which has been dealt face down; also figurative.

Poker. A (low) card which is of little value in a hand.

Poker. With the. More fully river card: the last card dealt to a player; (now more usually) the fifth and final community card to be dealt in…