1. whir - Noun
2. whir - Verb
To whirl round, or revolve, with a whizzing noise; to fly or more quickly with a buzzing or whizzing sound; to whiz.
To hurry a long with a whizzing sound.
A buzzing or whizzing sound produced by rapid or whirling motion; as, the whir of a partridge; the whir of a spinning wheel.
Source: Webster's dictionarythe motor whirred Source: Internet
the car engine purred Source: Internet
After a seemingly endless number have passed, and you’ve collected all the detergent samples you will ever need, you hear the whir of the TV helicopters---the riders are coming! Source: Internet
In the rare quiet moment, one can detect a slow, low whir, like an elevator steadily ascending. Source: Internet
In West Point, a familiar whir joins the evening sounds of crickets, trains in the distance, and children playing. Source: Internet
The team soon fell into a rhythm, talking softly over the whir of the machines and the overlapping beeps of the two heart monitors. Source: Internet