ac·tion ( k sh n)n. 1. The state or process of acting or doing: The medical team went into action. 2. Something done or accomplished; a deed. See Usage Note at act. 3. Organized activity to accomplish an objective: a problem requiring drastic action. 4. The causation of change by the exertion of power or a natural process: the action of waves on a beach; the action of a drug on blood pressure. 5. A movement or a series of movements, as of an actor. 6. Manner of movement: a horse with fine action. 7. Habitual or vigorous activity; energy: a woman of action. 8. Behavior or conduct. Often used in the plural. 9. a. The operating parts of a mechanism. b. The manner in which such parts operate. c. The manner in which a musical instrument can be played; playability: a piano with quick action. 10. The series of events and episodes that form the plot of a story or play. 11. The appearance of animation of a figure in painting or sculpture. 12. Law A judicial proceeding whose purpose is to obtain relief at the hands of a court. 13. a. Armed encounter; combat: missing in action. b. An engagement between troops or ships: fought a rear-guard action. 14. The most important or exciting work or activity in a specific field or area: always heads for where the action is. ac tion·less adj. |
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