The following is a glossary of poker terms used in Wikipedia poker articles. Some terms link to a more complete article on the topic.

Besides the terms listed here, there are thousands of common and uncommon poker slang terms. Finally, this is not meant to be a formal dictionary; precise usage details and multiple closely related senses are omitted here in favor of concise treatment of the basics. See also card game terminology and the Wiktionary for poker slang terms.

A

ace-to-five, ace-to-six

Methods of evaluating low hands. See ace-to-five low, ace-to-six low.

To make a play (bet, call, raise, or fold) at the required time. It is Ted's turn to act. Compare to "in turn".

1. A player's turn to act. The action is on you.
2. A willingness to gamble. I'll give you action or There's plenty of action in this game.
3. A bet, along with all the calls of that bet. For example, if one player makes a $5 bet and three other players call, he is said to have $5 "in action", and to have received $15 worth of action on his bet. Usually this term comes into play when figuring side pots when one or more players is all in. See table stakes.

action button

A marker similar to a kill button, on which a player places an extra forced bet. In a seven-card stud high-low game, the action button is awarded to the winner of a scoop pot above a certain size, signifying that in the next pot, that player will be required to post an amount representing a completion of the bring-in to a full bet. For example, in a stud game with $2 and $4 betting limits and a $1 bring-in, a player with the action button must post $2; after the cards are dealt, the player with the low card must still pay the $1 bring-in, then when the betting reaches the player who posted the $2, he is required to leave it in as a raise of the bring-in (and has the option to raise further). Players in between the bring-in and the action button can just call the bring-in, but they know ahead of time that they will be raised by the action button.

In Texas hold 'em or other community card games, a card appearing on the board that causes significant betting action because it helps two or more players. For example, an ace on the flop when two players each hold an ace.

In many cardrooms, with respect to an all-in bet, only a full (or half) bet can be reraised. Anything less than a full (or half) bet is considered to be action only, that is, other players can call the bet but not raise it. For example, Alice bets $100. Bob calls. Carol goes all in for $119. When the action returns to Alice and Bob, they may only call the extra $19; they cannot raise it. Carol's raise is called action only. Compare to "full bet rule", "half bet rule".

A player still involved in the pot. If there are side pots, an all-in player may be active in some pots, but not in others.