action

the operating part that transmits power to a mechanism

“the piano had a very stiff action”

a judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong

an act by a government body or supranational organization

“recent federal action undermined the segregationist position”

“the United Nations must have the power to propose and organize action without being hobbled by irrelevant issues”

“the Union action of emancipating Southern slaves”

the most important or interesting work or activity in a specific area or field

“the action is no longer in technology stocks but in municipal bonds”

“gawkers always try to get as close to the action as possible”

In firearms terminology, the mechanism that handles the ammunition (loads, locks, fires, and extracts the cartridges).

“{'source': 'https://en.wikipedia.org', 'text': 'Actions can be categorized in several ways, including single action versus double action, break action versus bolt action, and others.'}”