noun
EXAMPLES FROM CORPUS
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A pilot light on the tank's control panel conveniently lets you know when the iron is running out of steam.
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A tiny pilot light , if you like, that was necessary to set everything else in motion.
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Still swearing under his breath, Dexter pulled off the cover from the bottom of the boiler and relit the pilot light .
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The blue pilot light glowed behind the window of the central-heating boiler but the pump was switched off.
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The comforting blue flame of the pilot light was dead, blown out by the gusting wind of the night before.