Definitions

1. noun

A device consisting of a small explosive charge that ignites a fuel to produce a spark, used to ignite the fuel in an internal-combustion engine.

“The mechanic replaced the old sparkplug with a new one to improve the engine’s performance.”

2. noun

A person or thing that sparks or inspires enthusiasm or interest.

“The comedian was a sparkplug on the late-night talk show, bringing energy and laughter to the audience.”

3. verb

To spark or ignite enthusiasm or interest in something.

“The new movie sparkedplug the audience’s imagination, leaving them eager for more.”