ro·​tor | \ ˈrō-tər How to pronounce rotor (audio) \

Definition of rotor

1a : a part that revolves in a stationary part a brake rotor
b : the rotating member of an electrical machine
2 : an assembly of rotating blades that supplies lift or stability for a rotorcraft

Examples of rotor in a Sentence

Recent Examples on the Web Many eVTOL developers use tilt-rotor systems in which multiple rotors point skyward for takeoff and landing then pitch forward for horizontal flight. Eric Adams, Wired, "A New Air Taxi Model Takes Design Cues From a Far-Flying Bird," 12 June 2020 The Pentagon has faced criticism for the behavior on June 1 of two helicopters from the D.C. Guard, which hovered over demonstrators and blasted them with gusty rotor wash from the aircraft. Paul Sonne,, "Trump withdraws out-of-state National Guard members from D.C.," 7 June 2020 The downward force of the helicopter’s rotor blades snapped a small tree, with debris almost hitting several people. Eric Schmitt,, "Pentagon ordered National Guard helicopters’ aggressive response in D.C.," 6 June 2020 Lockheed Martin’s entry, designed by subsidiary Sikorsky, is the Raider-X. Raider X uses two contra-rotating main rotor blades and a push propeller. Kyle Mizokami, Popular Mechanics, "The Army’s New Recon Chopper Is Beginning To Take Shape," 26 Mar. 2020 An arriving officer said the North Royalton man was pinned by the car’s right front rotor. John Benson, cleveland, "Thief steals Independence man’s phone and car keys: Seven Hills Police Blotter," 13 May 2020 The two-rotor Wankel engine's intake charge is boosted by two sequential turbos. Larry Griffin, Car and Driver, "Comparison Test: 1993 Toyota Supra Turbo Takes On the Best Sports Cars of the Early 1990s," 12 May 2020 Beta developed the stations in tandem with work on its two prototype aircraft, first a small tilt-rotor version called Ava followed by a radically different production version called Alia, set to be revealed within a few weeks. Eric Adams, Wired, "A Rest Stop Where Flying Cars Can Recharge," 29 Mar. 2020 On the former point, Wallace says Mageshima could eventually see operations from US Marine Corps Osprey tilt-rotor aircraft, taking some of the load off current airfields on the main islands and Okinawa. Brad Lendon And Michelle Lim, CNN, "Japanese island could become an unsinkable US aircraft carrier," 6 Dec. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rotor.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of rotor

1892, in the meaning defined at sense 1a

History and Etymology for rotor

contraction of rotator

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Time Traveler for rotor

Time Traveler

The first known use of rotor was in 1892

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Statistics for rotor

Last Updated

16 Jun 2020

Cite this Entry

“Rotor.” Dictionary, Merriam-Webster, Accessed 7 Aug. 2020.

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More Definitions for rotor


How to pronounce rotor (audio)

English Language Learners Definition of rotor

technical : a part of a machine that turns around a central point


ro·​tor | \ ˈrō-tər How to pronounce rotor (audio) \

Kids Definition of rotor

1 : the part of an electrical machine that turns
2 : a system of spinning horizontal blades that support a helicopter in the air

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More from Merriam-Webster on rotor

Rhyming Dictionary: Words that rhyme with rotor

Spanish Central: Translation of rotor

Nglish: Translation of rotor for Spanish Speakers

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