thruster

noun

thrust·​er ˈthrə-stər How to pronounce thruster (audio)
variants or less commonly thrustor
: one that thrusts
especially : an engine (such as a jet engine) that develops thrust by expelling a jet of fluid or a stream of particles

Examples of thruster in a Sentence

Recent Examples on the Web
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.
This thruster uses this power to ionize a propellant (such as xenon), which is then funneled through nozzles to provide consistent thrust. Matthew S Williams, Interesting Engineering, 10 Jan. 2026 Then the Orion capsule will fire up its main thruster and shoot off towards the Moon on its 240,000-mile, four-day journey. The Week, TheWeek, 7 Jan. 2026 That week-plus stretched into nine months due to thruster problems aboard Starliner that NASA concluded made the ship unsafe for crews. Jeffrey Kluger, Time, 2 Jan. 2026 But Starliner suffered thruster problems and helium leaks on the way up, so NASA delayed the vehicle's return to study the issues. Mike Wall, Space.com, 21 Dec. 2025 See All Example Sentences for thruster

Word History

First Known Use

1597, in the meaning defined above

Time Traveler
The first known use of thruster was in 1597

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Cite this Entry

“Thruster.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thruster. Accessed 14 Jan. 2026.

Kids Definition

thruster

noun
thrust·​er ˈthrəs-tər How to pronounce thruster (audio)
: one that thrusts
especially : an engine that produces thrust by discharging a jet of fluid or a stream of particles

More from Merriam-Webster on thruster

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