pilot light is a noun meaning "small auxiliary gas burner that provides a flame to ignite a larger gas burner". It carries 2 recorded senses.
small auxiliary gas burner that provides a flame to ignite a larger gas burner
indicator consisting of a light to indicate whether power is on or a motor is in operation
Definitions, synonyms and semantic relations for pilot light come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.