idiot light

noun

: a colored light on an instrument panel (as of an automobile) designed to give a warning (as of low oil pressure)

Word History

First Known Use

1966, in the meaning defined above

Time Traveler
The first known use of idiot light was in 1966

Rhymes for idiot light

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Browse Nearby Words

idiotize
idiot light
idiotproof
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Cite this Entry

“Idiot light.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/idiot%20light. Accessed 18 Jul. 2025.

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