Definitions from Wiktionary ( )

▸ noun:  The effort of performing or doing something.
▸ noun:  Something done, often so as to accomplish a purpose.
▸ noun:  A way of motion or functioning.
▸ noun:  Fast-paced activity.
▸ noun:  The way in which a mechanical device acts when used; especially a firearm.
▸ noun:  (firearms) The way in which cartridges are loaded, locked, and extracted from the mechanism.
▸ noun:  (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.
▸ noun:  (music, lutherie) The distance separating the strings and the fingerboard on a string instrument.
▸ noun:  (slang, typically with a quantifier) Sexual intercourse.
▸ noun:  (military) Combat.
▸ noun:  (law) A charge or other process in a law court (also called lawsuit and actio).
▸ noun:  (mathematics) A way in which each element of some algebraic structure transforms some other structure or set, in a way which respects the structure of the first. Formally, this may be seen as a morphism from the first structure into some structure of endomorphisms of the second; for example, a group action of a group G on a set S can be seen as a group homomorphism from G into the set of bijections on S (which form a group under function composition), while a module M over a ring R can be defined as an abelian group together with a ring homomorphism from R into the ring of group endomorphisms of M (which is also called the action of R on M).
▸ noun:  (physics) The product of energy and time, especially the product of the Lagrangian and time.
▸ noun:  (literature) 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.
▸ noun:  (art, painting and sculpture) The attitude or position of the several parts of the body as expressive of the sentiment or passion depicted.
▸ noun:  (bowling) spin put on the bowling ball.
▸ noun:  (obsolete) A share in the capital stock of a joint-stock company, or in the public funds.
▸ noun:  (Christianity) A religious performance or solemn function, i.e. action sermon, a sacramental sermon in the Scots Presbyterian Church.
▸ noun:  (sciences) a process existing in or produced by nature (rather than by the intent of human beings).
▸ noun:  A demonstration by activists.
▸ adjective:  (Manglish) arrogant
▸ verb:  (transitive, management) To act on a request etc, in order to put it into effect.
▸ verb:  (transitive, chiefly archaic) To initiate a legal action against someone.

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