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say it: STAH-plahyt
stoplight is a noun meaning "a red light on the rear of a motor vehicle that signals when the brakes are applied to slow or stop". It carries 2 recorded senses.
a red light on the rear of a motor vehicle that signals when the brakes are applied to slow or stop
a visual signal to control the flow of traffic at intersections
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for stoplight come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.