Definitions

1. noun

a person or thing that rotates something

“The rotator of the satellite dish ensured it was properly aligned.”

2. noun

a part of the body that rotates, especially the shoulder joint or the muscles surrounding it

“The rotator cuff in her shoulder was injured during the accident.”

3. noun

a device or mechanism that rotates something

“The rotator of the engine was causing the car to stall.”