rotor

noun

ro·​tor ˈrō-tər 

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

Pilot error was also blamed in the crash that killed Gentry, while an investigation of the crash involving Vichai concluded that the Leonardo AW169 helicopter was brought down by a failure of its rear rotor mechanism. —Scott Neuman, NPR, 21 May 2024

Also, the movement is beautiful, with a solid-gold rotor (for a-magnetism, in fact) plated in dark-gray rhodium to preserve the toolish look of this amazing dive watch. —Allen Farmelo, Robb Report, 16 May 2024

Word History

Etymology

contraction of rotator

First Known Use

1892, in the meaning defined at sense 1a

Phrases Containing rotor

• tilt-rotor

Kids 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