spark plug
noun
1
: a part that fits into the cylinder head of an internal combustion engine and carries two electrodes separated by an air gap across which the current from the ignition system discharges to form the spark for combustion
2
: one that initiates or gives impetus to an undertaking
Examples of spark plug in a Sentence
Recent Examples on the Web
The Trofeo trades the powerful little hybrid powertrain for a monster of the sort that made Italian performance famous: a 523-hp twin-turbo 3.0L V6 that can disable three cylinders for fuel economy and has two spark plugs and two fuel injectors per cylinder.
—
Mark Phelan, Detroit Free Press, 17 July 2024
As electric vehicle markets grow, what will happen to makers of engine blocks, spark plugs, radiators, transmissions, castings and the rest of our gasoline engine supply chain?
—Kathleen Gallagher, Journal Sentinel, 14 June 2024
Linklater’s spark plug of a romantic thriller/comedy, which cleverly springboards off the real-life exploits of fake assassin Gary Johnson (embellishing on them, of course).
—Randy Myers, The Mercury News, 5 June 2024
Motorcyclists can bring their bike to their local dealers to replace all four spark plugs for free.
—USA TODAY, 1 Apr. 2024
See all Example Sentences for spark plug 
Mark Phelan, Detroit Free Press, 17 July 2024
As electric vehicle markets grow, what will happen to makers of engine blocks, spark plugs, radiators, transmissions, castings and the rest of our gasoline engine supply chain?
—Kathleen Gallagher, Journal Sentinel, 14 June 2024
Linklater’s spark plug of a romantic thriller/comedy, which cleverly springboards off the real-life exploits of fake assassin Gary Johnson (embellishing on them, of course).
—Randy Myers, The Mercury News, 5 June 2024
Motorcyclists can bring their bike to their local dealers to replace all four spark plugs for free.
—USA TODAY, 1 Apr. 2024
See all Example Sentences for spark plug
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'spark plug.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Spark plug.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spark%20plug. Accessed 26 Jul. 2024.
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