action

Definitions

• Something done so as to accomplish a purpose.
• A way of motion or functioning.
• Fast-paced activity.
• A mechanism; a moving part or assembly.
• (music) The mechanism, that is the set of moving mechanical parts, of a keyboard instrument, like a piano, which transfers the motion of the key to the sound-making device.
• (music) The distance separating the strings and the fretboard on a guitar.
• (slang) sexual Sexual intercourse.
• (military) Combat.
• (legal) A charge or other process in a law court (also called lawsuit (lawsuit) and actio).
• (mathematics) A mapping from a pairing of mathematical objects to one of them, respecting their individual structures. The pairing is typically a Cartesian product or a tensor product. The object that is not part of the output is said to act on the other object. In any given context, action is used as an abbreviation for a more fully named notion, like group action or left group action.
• (physics) The product of energy and time, especially the product of the Lagrangian Lagrangian and time.
• The event or connected series of events, either real or imaginary, forming the subject of a play, poem, or other composition; the unfolding of the drama of events.
• (art) The attitude or position of the several parts of the body as expressive of the sentiment or passion depicted.
• (bowling) spin put on the bowling ball.
• (obsolete) A share in the capital stock of a joint-stock company, or in the public funds.