Spoken action by a player at the poker table. For example, if it is your turn to act and you say “I call,” calling is your only option. Verbal is said to be “binding” at most casinos.
For example, when playing in World Series of Poker tournaments, a verbal statement of check, call, fold, raise or announcing a specific size bet is “binding” on an active player in the hand.
When playing online poker, verbal actions made in the chat box online such as typing “I call,” is not “binding”. Some players disable chat, and it would be impossible for tournament directors online to police this, so binding actions are those that are done with the click of the mouse.