1. （煤气灶具、锅炉等用于引火的）常燃小火
A pilot light is a small gas flame in a cooker, stove, boiler, or fire. It burns all the time and lights the main large flame when the gas is turned fully on.

1. small auxiliary gas burner that provides a flame to ignite a larger gas burner

Synonym: pilot burnerpilot

2. indicator consisting of a light to indicate whether power is on or a motor is in operation

Synonym: pilot lampindicator lamp