To act; to act positively and decisively to resolve a problem.

(physiology) A short-term change in the electrical potential that travels along a cell such as a nerve or muscle fiber.

(grammar) A word that indicates an action, event or state.

(obsolete, rare, phrenology) The state or quality in which a person exhibits willingness to act rather than talk.

(chiefly Britain) A workplace protest by employees designed to inconvenience or disrupt the business of the employer.

A word that expresses action and tells what the subject of a sentence does.

plural of course of action

A plan; a set of intended actions, through which one intends to achieve a goal.

A children's toy in the form of a posable plastic figurine of a character, often from a movie, video game, or television program, with moving parts and often capable of some form of spring-loaded movement. It is used to distinguish from dolls, which have acquired the reputation as a girl's toy, whereas action figures are more marketed toward boys.

A form of political activism in which participants act directly, ignoring established political procedures. It may take the form of strikes, workplace occupations, sabotage, sit-ins, squatting, revolutionary/guerrilla warfare, demonstrations, vandalism or graffiti.