: a rotary engine actuated by the reaction or impulse or both of a current of fluid (such as water, steam, or air) subject to pressure and usually made with a series of curved vanes on a central rotating spindle

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The oldest and simplest form of turbine is the waterwheel, which is made to rotate by water falling across its blades and into buckets suspended from them. Hero of Alexandria invented the first steam-driven turbine in the 1st century A.D., but a commercially practical steam turbine wasn't developed until 1884; steam turbines are now the main elements of electric power stations. Jet engines are gas turbines. A turbojet engine uses a turbine to compress the incoming air that feeds the engine before being ejected to push the plane forward; a turboprop engine uses its exhaust to drive a turbine that spins a propeller. A wind turbine generates electricity by being turned by the wind; the largest now have vanes with a turning diameter of over 400 feet.

Examples of turbine in a Sentence

Recent Examples on the Web
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Instead of replacing the turbines, the company’s system is designed to add a secondary power cycle. — Neetika Walter, Interesting Engineering, 24 Sep. 2026 To do this, workers make surgical modifications and upgrades to key plant equipment, including turbines, pumps, motors and cooling systems. — Kristi Swartz, AJC.com, 22 Sep. 2026 Berkshire Hathaway in 2016 bought Precision Castparts, a manufacturer for products used in turbines, which are the main component in electrical generators. — John Towfighi, CNN Money, 19 Sep. 2026 The Block Island Wind Farm, a five-turbine test project that was the first offshore wind farm in America, was completed a decade ago. — Alex Kuffner, The Providence Journal, 17 Sep. 2026 See All Example Sentences for turbine

Word History

Etymology

French, from Latin turbin-, turbo top, whirlwind, whirl, from turba confusion — more at turbid

First Known Use

1842, in the meaning defined above

Time Traveler
The first known use of turbine was in 1842

Cite this Entry

“Turbine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/turbine. Accessed 25 Sep. 2026.

Kids Definition

turbine

noun
: an engine whose central driving shaft is fitted with a series of blades spun around by the pressure of a fluid (as water, steam, or air)
Etymology

from French turbine "turbine," from Latin turbin-, turbo "top (for spinning), whirlwind"

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