sound of something in rapid motion;
"whir of a bird's wings"
"the whir of the propellers"
make a soft swishing sound;
"the motor whirred"
"the car engine purred"
- The bird flew past, its wings whirring.
- A limousine whirred him away.
- There was a sudden whir as the airplane started its engines.
- Only the whir of the air conditioner broke the silence in the office
- I could only hear the whir of turning wheels.
- whirr 发出呼呼声