Dictionary

rotor

noun ro·tor \ˈrō-tər\

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

Full Definition of ROTOR

a : a part that revolves in a stationary part <a brake rotor>

b : the rotating member of an electrical machine

: an assembly of rotating blades that supplies lift or stability for a rotorcraft

See rotor defined for English-language learners

See rotor defined for kids

contraction of rotator

First Known Use: 1903

ROTOR Defined for Kids

noun ro·tor \ˈrō-tər\

: the part of an electrical machine that turns

: a system of spinning horizontal blades that support a helicopter in the air

Next Word in the Dictionary: rotor bladePrevious Word in the Dictionary: rotondaAll Words Near: rotor

What made you want to look up rotor? Please tell us where you read or heard it (including the quote, if possible).

Put-downs with flair

How to use a word that (literally) drives some people nuts.

Test your vocab with our fun, fast game

Ailurophobia, and 9 other unusual fears