definition
Something done so as to accomplish a purpose.
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A way of motion or functioning.
example
Knead bread with a rocking action.
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Fast-paced activity.
example
a movie full of exciting action
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A mechanism; a moving part or assembly.
example
a rifle action
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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.
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The distance separating the strings and the fretboard on a guitar.
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Sexual intercourse.
example
She gave him some action.
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Combat.
example
He saw some action in the Korean War.
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A charge or other process in a law court (also called lawsuit and actio).
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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.
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The product of energy and time, especially the product of the Lagrangian and time.
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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.
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(painting and sculpture) The attitude or position of the several parts of the body as expressive of the sentiment or passion depicted.
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Spin put on the bowling ball.
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A share in the capital stock of a joint-stock company, or in the public funds.