Whirr - Definition
whirr
n 1: sound of something in rapid motion; "whir of a bird's
wings"; "the whir of the propellers" [syn: whir, whirr,
whirring, birr]
v 1: make a soft swishing sound; "the motor whirred"; "the car
engine purred" [syn: whizz, whiz, whirr, whir,
birr, purr]
2: make a vibrant sound, as of some birds [syn: churr,
whirr]