English · Slang Attested

dummy light

In real, traceable use. Part of the curated seed collection; community review is coming.

Sense 1

Meaning · English

Synonym of idiot light (“warning light”).

Where it’s used: Used American English

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Sense 2

Meaning · English

A type of stop light (traffic light) set in the middle of the intersection, and not at the sides, corners or above (thus forming a crash hazard). These lights are placed similarly to how traffic police platforms are set dead center of intersections.

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Common questions

What does “dummy light” mean?

Synonym of idiot light (“warning light”).

Is “dummy light” formal or informal?

dummy light is generally slang.

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