(n) legal action , action, action at law (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)
(n) action (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"
(n) action (the series of events that form a plot) "his novels always have a lot of action"
(n) action, action mechanism (the operating part that transmits power to a mechanism) "the piano had a very stiff action"
(n) action (the trait of being active and energetic and forceful) "a man of action"
(n) action (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"
(v) action, sue , litigate , process (institute legal proceedings against; file a suit against) "He was warned that the district attorney would process him"; "She actioned the company for discrimination"