In the game of
poker, a betting round is said to be
closed if no player will have the right to
raise in the round. Normally this occurs when a player calls, and the next player whose turn it is to act is the one who made the last raise, so he cannot raise further (this ends the betting round). The round can also said to be closed before it has actually ended if there are still players remaining to act, but they will not be entitled to raise either because the last raise was a sub-minimum all-in raise (see
poker table stakes rules) or because the limit ("cap") on allowed raises has been reached.