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
The advanced rotor compressor is paired with copper piping and a triple-layer heat exchange system to draw moisture efficiently while staying quiet.
—
Shubham Yewale, PC Magazine, 18 July 2025
Stopping power is still provided by hydraulic brakes with 180-mm rotors, but the new models sports Star Union brakes front and rear, along with a new parking brake mechanism.
—New Atlas, 12 July 2025
One building at the Tehran Research Center was hit, where advanced centrifuge rotors were manufactured.
—Amanda Castro
shane Croucher, MSNBC Newsweek, 18 June 2025
Ware explained how the brake problem got worse after an incident with the No. 7 car, eventually leading to his brake rotor exploding.
—Saajan Jogia, MSNBC Newsweek, 7 July 2025
See All Example Sentences for rotor
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Shubham Yewale, PC Magazine, 18 July 2025
Stopping power is still provided by hydraulic brakes with 180-mm rotors, but the new models sports Star Union brakes front and rear, along with a new parking brake mechanism.
—New Atlas, 12 July 2025
One building at the Tehran Research Center was hit, where advanced centrifuge rotors were manufactured.
—Amanda Castro
shane Croucher, MSNBC Newsweek, 18 June 2025
Ware explained how the brake problem got worse after an incident with the No. 7 car, eventually leading to his brake rotor exploding.
—Saajan Jogia, MSNBC Newsweek, 7 July 2025
See All Example Sentences for rotor
Cite this Entry
“Rotor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rotor. Accessed 30 Jul. 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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