Thesaurus.com
Dictionary.com
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 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

On Sept. 21, the Rams traded Cam Akers and found their running back answer, a spark plug named Kyren Williams.

From Los Angeles Times • Jan. 10, 2024

Leo doubted the poor guy could pop a spark plug in the shape he was in.

From "The Mark of Athena" by Rick Riordan