idiot light


: 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

Dictionary Entries Near idiot light

Cite this Entry

“Idiot light.” Dictionary, Merriam-Webster, Accessed 9 Dec. 2023.

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