pilot light

noun
Updated on: 24 Feb 2018

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

Recent Examples of pilot light from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pilot light.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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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