Definition of rotor
1a : a part that revolves in a stationary part a brake rotorb : the rotating member of an electrical machine
2 : an assembly of rotating blades that supplies lift or stability for a rotorcraft
Recent Examples of rotor from the Web
When the crane lifts, the system converts the momentum of the rotors to electricity.
The company says an engine crankshaft timing rotor may have been produced with excessive anti-corrosion coating, which could cause the crank position sensor to malfunction.
Other standard features include a MacPherson strut front suspension and five-link rear suspension; electric power steering; four-wheel disc brakes, with GM’s Duralife rotors; and an electronic parking brake.
Eberhard’s supercharged update of that motor is powered by a copper and steel rotor that is spun by a magnetic field.
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.
Origin and Etymology of rotor
contraction of rotator
First Known Use: 1892
ROTOR Defined for English Language Learners
Definition of rotor for English Language Learners
: a part of a machine that turns around a central point
ROTOR Defined for Kids
Definition of rotor for Students
1 : the part of an electrical machine that turns
2 : a system of spinning horizontal blades that support a helicopter in the air
Seen and Heard
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