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The dynamo was introduced in 1867 to produce electricity for commercial use. Like all later generators, the original dynamos changed mechanical energy (produced by steam, which was itself produced by burning coal) into electricity. The word is less used today than it once was, since it's often applied only to generators that produced direct electric current (DC) rather than alternating current (AC), which is now the standard. A human dynamo is a person who seems to have unlimited energy.
Examples of dynamo in a Sentence
a dynamo who barely needs to sleep, or so it seems
Recent Examples on the Web
On Script: Jerry Jones runs the old playbook Micah Parsons, the 26-year-old defensive dynamo with 52 1/2 sacks and two first-team All-Pro nods across his first four seasons, reported to Dallas Cowboys training camp this week.
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Alex Kirshner, New York Times, 26 July 2025
This indicates that the moon's internal dynamo fluctuated, possibly episodically, rather than just experiencing a slow but gradual decline.
—Keith Cooper, Space.com, 16 July 2025
Smith’s roster includes former Santa Clara star Jalen Williams (Thunder), all-world athlete Anthony Edwards (Timberwolves) and offensive dynamo Jalen Brunson (Knicks).
—Bay Area News Group, The Mercury News, 16 Feb. 2025
Headed by bass-guitar dynamo and EWF co-founder Verdine White, the current lineup also features two members — singer Philip Bailey and drummer Ralph Johnson — who both came on board in 1972.
—George Varga, San Diego Union-Tribune, 3 July 2025
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Alex Kirshner, New York Times, 26 July 2025
This indicates that the moon's internal dynamo fluctuated, possibly episodically, rather than just experiencing a slow but gradual decline.
—Keith Cooper, Space.com, 16 July 2025
Smith’s roster includes former Santa Clara star Jalen Williams (Thunder), all-world athlete Anthony Edwards (Timberwolves) and offensive dynamo Jalen Brunson (Knicks).
—Bay Area News Group, The Mercury News, 16 Feb. 2025
Headed by bass-guitar dynamo and EWF co-founder Verdine White, the current lineup also features two members — singer Philip Bailey and drummer Ralph Johnson — who both came on board in 1972.
—George Varga, San Diego Union-Tribune, 3 July 2025
See All Example Sentences for dynamo
Cite this Entry
“Dynamo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dynamo. Accessed 2 Aug. 2025.
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