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Definitions

spark plug

NOUN
device that ignites fuel in engine
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The spark plug ignites a fuel-air mix, causing the rotor to turn a shaft, creating motion.

From The Wall Street Journal • Apr. 24, 2026

The spark plug ignites a fuel-air mix, causing the rotor to turn a shaft, creating motion.

From The Wall Street Journal • Apr. 24, 2026

That caused a short-circuit and "arcing" - electric sparks like those in a spark plug - which resulted in a "catastrophic failure".

From BBC • Jul. 2, 2025

Said coach Mike Dulaney: “That guy is such a spark plug and plays the game so effortlessly. We got to get him to do intramural or something.”

From Los Angeles Times • Mar. 8, 2024

There were times when a crew needed that kind of spark plug to get it revved up and firing on all cylinders.

From "The Boys in the Boat: Nine Americans and Their Epic Quest for Gold at the 1936 Berlin Olympics" by Daniel James Brown




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