idiot light

noun

Definition of idiot light

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

First Known Use of idiot light

1966, in the meaning defined above

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The first known use of idiot light was in 1966

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Cite this Entry

“Idiot light.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/idiot%20light. Accessed 23 Jan. 2021.

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