pilot light
noun
Also called pilot, pilot burner.
a small flame kept burning continuously, as in a gas stove or furnace, to relight the main gas burners whenever necessary or desired.
Origin of pilot light
First recorded in 1885–90
Words nearby pilot light
pilot fish,
pilot flag,
pilot house,
pilot ladder,
pilot lamp,
pilot light,
pilot officer,
pilot plant,
pilot raise,
pilot signal,
pilot station
British Dictionary definitions for pilot light
pilot light
noun
a small auxiliary flame that ignites the main burner of a gas appliance when the control valve opens
a small electric light used as an indicator