{ or }. (Elec.) 1. A small incandescent telltale lamp on a dynamo or battery circuit to show approximately by its brightness the voltage of the current. [ Webster 1913 Suppl. ]
2. a small light on an electrical device to indicate whether the device is in operation or that the power is on. [ PJC ]
n. a small gas flame kept burning continuously on a stove, water heater, or other gas-burning device, so as to allow immediate ignition of the main flame when the gas flow is turned on. [ PJC ]