1. the act or sound of making a low, continuous, vibrating sound

1. making a low, continuous, vibrating sound (as a cat does when content)
Usage: present participle of ‘purr’
2. running smoothly and quietly (as an engine)
Usage: present participle of ‘purr’

1. making a purring sound; running smoothly

Examples

• The cat was purring contentedly on my lap.
• The engine was purring like a kitten after the tune-up.
• I could hear the gentle purring of the motor.
• The purring sound indicated the machine was working properly.
• She listened to the purring of her cat as she fell asleep.
• The car’s purring engine impressed the mechanic.
• The kitten’s purring grew louder when I petted it.