Unable to work or function, often due to a particular event.

(ichthyology) The use of light originating from the organism to illuminate the visual field to see into the field of vision.

In TV broadcasting, the reshowing of a short segment of action, especially slow-motion sporting action, shortly after it was broadcast live or in real-time.

(military) maximum distance a ship, vehicle, etc. can travel away from its base without refueling

Before an action takes place, especially a legal action.

A female actor who performs on stage.

Offensive and hostile action carried out by an enemy country's military forces, especially during a war.

Dated spelling of radioactive.

(transitive) Synonym of put into practice

(of a report, analysis, etc.) Written retrospectively on a given sequence of goal-oriented actions previously taken, especially if by the author himself.