pilot light

noun

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

1881


PILOT LIGHT Defined for English Language Learners

pilot light

noun

Definition of pilot light for English Language Learners

  • : a small flame that is always burning in a gas stove, burner, etc., and that is used to light a larger flame



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