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
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Lopes was the spark plug atop the lineup, becoming one of the best base stealers in the game.
—
Assistant Sports Editor, Los Angeles Times, 10 Apr. 2026
Shifted into the leadoff spot, the senior shortstop immediately became a spark plug for the Spartans, setting the table and igniting the engine of a lineup that feeds off his energy.
—Patrick Z. McGavin, Chicago Tribune, 8 Apr. 2026
Its brands include Autolite spark plugs, Fram filters and Trico windshield wipers.
—Kelsey Brown, San Antonio Express-News, 6 Mar. 2026
The porcelain of the spark plugs should be a beige color.
—John Paul, The Providence Journal, 6 Mar. 2026
See All Example Sentences for spark plug
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Assistant Sports Editor, Los Angeles Times, 10 Apr. 2026
Shifted into the leadoff spot, the senior shortstop immediately became a spark plug for the Spartans, setting the table and igniting the engine of a lineup that feeds off his energy.
—Patrick Z. McGavin, Chicago Tribune, 8 Apr. 2026
Its brands include Autolite spark plugs, Fram filters and Trico windshield wipers.
—Kelsey Brown, San Antonio Express-News, 6 Mar. 2026
The porcelain of the spark plugs should be a beige color.
—John Paul, The Providence Journal, 6 Mar. 2026
See All Example Sentences for spark plug
Cite this Entry
“Spark plug.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spark%20plug. Accessed 17 Apr. 2026.
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