pilot lamp
noun
an electric lamp, used in association with a control, which by means of position or color indicates the functioning of the control; an indicator light or a control light.
Also called
pilot light.
Origin of pilot lamp
First recorded in 1880–85
Words nearby pilot lamp
pilot film,
pilot fish,
pilot flag,
pilot house,
pilot ladder,
pilot lamp,
pilot light,
pilot officer,
pilot plant,
pilot raise,
pilot signal
British Dictionary definitions for pilot lamp
pilot lamp
noun
a small light in an electric circuit or device that lights up when the circuit is closed or when certain conditions prevail