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
What had flummoxed the other shop took Frank moments to diagnose with a simple spark plug test.
—
Raphael Orlove, Robb Report, 27 Nov. 2024
The company makes things like brakes and spark plugs for several car manufacturers, which proved a boon as globalization expanded at the turn of the century.
—Byryan Hogg, Fortune Europe, 25 Nov. 2024
Inside a vehicle, noise is generated by spark plugs, electric motors and cell phones, Daniel Shwartzberg, the company’s director of business development and system solutions, said during the investor day presentation.
—Bill Koenig, Forbes, 21 Nov. 2024
The two receivers were the spark plugs in a successful two-minute drive for Herbert against the starting defense.
—Daniel Popper, The Athletic, 30 July 2024
See all Example Sentences for spark plug 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Raphael Orlove, Robb Report, 27 Nov. 2024
The company makes things like brakes and spark plugs for several car manufacturers, which proved a boon as globalization expanded at the turn of the century.
—Byryan Hogg, Fortune Europe, 25 Nov. 2024
Inside a vehicle, noise is generated by spark plugs, electric motors and cell phones, Daniel Shwartzberg, the company’s director of business development and system solutions, said during the investor day presentation.
—Bill Koenig, Forbes, 21 Nov. 2024
The two receivers were the spark plugs in a successful two-minute drive for Herbert against the starting defense.
—Daniel Popper, The Athletic, 30 July 2024
See all Example Sentences for spark plug
Dictionary Entries Near spark plug
Cite this Entry
“Spark plug.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spark%20plug. Accessed 22 Dec. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share