an artificial source of visible illumination

a lamp that produces light when electric current flows across the gap between two electrodes

an electric lamp in which the light comes from an electric discharge between two electrodes in a glass tube

a small portable battery-powered electric lamp

electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity

(ophthalmology) a lamp that emits a narrow but intense beam of light that enables an ophthalmologist, using a microscope, to view the retina and optic nerve