whirr Meaning, Definition & Usage

1. noun sound of something in rapid motion
   birr; whir; whirring.
   
   • whir of a bird's wings
   • the whir of the propellers
2. verb make a soft swishing sound
   purr; birr; whizz; whiz; whir.
   
   • the motor whirred
   • the car engine purred
3. verb make a vibrant sound, as of some birds
   churr.
   

WordNet