Simple Definition of pilot light
: a small flame that is always burning in a gas stove, burner, etc., and that is used to light a larger flame
Full Definition of pilot light
1 : a small permanent flame used to ignite gas at a burner
2 : an indicator light showing where a switch or circuit breaker is located or whether a motor is in operation or power is on —called also pilot lamp
First Known Use of pilot light
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