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
Building off the trust shown by his coaches, Rosas has become Sandburg’s spark plug.
—
Patrick Z. McGavin, Chicago Tribune, 28 May 2026
Check and replace spark plugs for your generators.
—Rafael Olmeda, Sun Sentinel, 26 May 2026
The winter had pulled Grant into the orbit of UCLA women’s basketball, where the softball superstar became a role player, a spark plug, another body hurling itself at eventual WNBA draft picks in pursuit of a national title.
—Ira Gorawara, New York Times, 15 May 2026
Millie Bobby Brown reprises her role as Sherlock Holmes' spark plug of a little sister for a third time.
—Brian Truitt, USA Today, 12 May 2026
See All Example Sentences for spark plug
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Patrick Z. McGavin, Chicago Tribune, 28 May 2026
Check and replace spark plugs for your generators.
—Rafael Olmeda, Sun Sentinel, 26 May 2026
The winter had pulled Grant into the orbit of UCLA women’s basketball, where the softball superstar became a role player, a spark plug, another body hurling itself at eventual WNBA draft picks in pursuit of a national title.
—Ira Gorawara, New York Times, 15 May 2026
Millie Bobby Brown reprises her role as Sherlock Holmes' spark plug of a little sister for a third time.
—Brian Truitt, USA Today, 12 May 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 29 May. 2026.
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