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.

An actor who provides voices or voice-overs for radio drama, animations, commercials, dubbed films, games, etc.

(chemistry) unbiunium / (chemistry) untriennium (dvi-lanthanum)

The practice of using action to achieve a result, such as political demonstration or a strike in support of or in opposition to an issue.

The specific compound in a natural or man-made mixture that is responsible for the mixture's activity.

(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.

Sewage that has been aerated and agitated in order to promote the growth of beneficial microorganisms that break down organic matter.