(uncountable) A set of policies or programs providing advantages for people of a group who are seen to have traditionally been the target of discrimination

An actor or actress who plays the leading role or a major role in an action movie.

(law, chiefly US, Canada) A lawsuit brought by a single plaintiff or small group of plaintiffs as a representative of a large group of others having a common interest, with everyone in the large group eligible to receive damages if the plaintiff is successful.

A film, novel, television series or video game characterized by action, intrigue, and sometimes violence.

The designation for a member of an organization (primarily military) who has died while on duty.

(chiefly military) The designation for a member of an organization (usually military) with whom contact is lost and whose whereabouts are not known, but whose death is not confirmed.

(law) In the United States, a lawsuit between private parties, including an action by a private person against a government entity, which will be treated as a private party by the court.

(law) A condition under which one party would be entitled to sue another. / (law) A civil lawsuit.

(physics) The drawing of a liquid (often against gravity) into or up narrow interstices due to surface tension

(military) A tactical subdivision of a larger area, the responsibility for which is assigned to a tactical unit; generally applied to offensive action.