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 rest—spark plugs, crankshafts, windshields, tires and whatnot—are supplied by third parties.
—
Christiaan Hetzner, Fortune, 18 Aug. 2024
Meanwhile, tune-ups, oil changes and spark plug replacements are now things of the past at the South Pasadena Police Department.
—Sandra McDonald, Los Angeles Times, 31 July 2024
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
See all Example Sentences for spark plug 
Christiaan Hetzner, Fortune, 18 Aug. 2024
Meanwhile, tune-ups, oil changes and spark plug replacements are now things of the past at the South Pasadena Police Department.
—Sandra McDonald, Los Angeles Times, 31 July 2024
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
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 20 Sep. 2024.
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