Whirr

What is Whirr?

Whirr is (noun) a low sound like something turning I was woken up by the whirr of a small plane. (verb) to make a low sound like something turning The journalists’ cameras were whirring and clicking as she stepped out of the church. (NOTE: [all (verb) senses] The US spelling is whir.)

 

source: Easier English, Student Dictionary Upper Intermediate Level