idiot light
noun
: a colored light on an instrument panel (as of an automobile) designed to give a warning (as of low oil pressure)
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Cars have idiot lights, warnings, and sensors for everything.
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Hartford Courant, 14 Mar. 2026
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Hartford Courant, 14 Mar. 2026
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“Idiot light.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/idiot%20light. Accessed 27 Mar. 2026.
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