A raised and level floor or platform. A raised platform on which theatrical performances are presented. An area in which actors perform. The acting profession, or the world of theater. Used with the: The stage is her life. The scene of an event or of a series of events. A platform on a microscope that supports a slide for viewing. A scaffold for workers. A resting place on a journey, especially one providing overnight accommodations. The distance between stopping places on a journey; a leg: proceeded in easy stages. A stagecoach. A level or story of a building. The height of the surface of a river or other fluctuating body of water above a set point: at flood stage. A level, degree, or period of time in the course of a process: the toddler stage of child development; the early stages of a disease. A point in the course of an action or series of events: too early to predict a winner at this stage. One of two or more successive propulsion units of a rocket vehicle that fires after the preceding one has been jettisoned. Geology A subdivision in the classification of stratified rocks, ranking just below a series and representing rock formed during a chronological age. Electronics An element or a group of elements in a complex arrangement of parts, especially a single tube or transistor and its accessory components in an amplifier. To exhibit or present on or as if on a stage: stage a boxing match. To produce or direct (a theatrical performance). To arrange and carry out: stage an invasion. Medicine To determine the extent or progression of (a cancer, for example). To be adaptable to or suitable for theatrical presentation. To stop at a designated place in the course of a journey: "tourists from London who had staged through Warsaw\u201d ( Frederick Forsyth).