1
a
: 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
That included the right engine and tail rotor, the NTSB said on Thursday.
—
Jeanine Santucci, USA TODAY, 10 Feb. 2025
Among the pieces still missing are the Black Hawk’s right engine and tail rotor.
—Alexandra Skores, CNN, 8 Feb. 2025
The effort to find the right engine and tail rotor from the Black Hawk continues, the agency said.
—Tim Stelloh, NBC News, 7 Feb. 2025
The rotors kicked up a thick cloud that blotted out the ground and sky, disorienting the pilot.
—Jeremy Bogaisky, Forbes, 4 Feb. 2025
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Jeanine Santucci, USA TODAY, 10 Feb. 2025
Among the pieces still missing are the Black Hawk’s right engine and tail rotor.
—Alexandra Skores, CNN, 8 Feb. 2025
The effort to find the right engine and tail rotor from the Black Hawk continues, the agency said.
—Tim Stelloh, NBC News, 7 Feb. 2025
The rotors kicked up a thick cloud that blotted out the ground and sky, disorienting the pilot.
—Jeremy Bogaisky, Forbes, 4 Feb. 2025
See all Example Sentences for rotor
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Cite this Entry
“Rotor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rotor. Accessed 21 Feb. 2025.
Copy CitationKids Definition
rotor
noun
ro·tor
ˈrōt-ər 
1
: a part that rotates in a stationary part (as in an electrical machine)
2
: a complete system of rotating blades that support a helicopter in flight
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