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Definitions

spark plug

NOUN
device that ignites fuel in engine
Synonyms
WEAK
ball of fire detonator fuse human dynamo ignition system sparker

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 wind-down of those businesses, including aftermarket parts maker Cardone and spark plug manufacturer Autolite, comes in addition to the layoffs announced Monday.

From The Wall Street Journal • Feb. 23, 2026

First Brands said Monday it has started winding down Brake Parts, aftermarket parts maker Cardone and spark plug manufacturer Autolite.

From The Wall Street Journal • Jan. 26, 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

Heckel served as a spark plug off the bench.

From Los Angeles Times • Apr. 1, 2025

My father went to mow the grass, but the spark plug was gone from the mower.

From "Crash" by Jerry Spinelli