definition of
birr

[1] #1 birr n. the basic unit of money in Ethiopia; equal to 100 cents. wn

[2] #2 birr v. [whizz, whiz, whirr, whir, purr] make a soft swishing sound; "the motor whirred"; "the car engine purred". wn

[3] #3 birr n. [whir, whirr, whirring] sound of something in rapid motion; "whir of a bird's wings"; "the whir of the propellers". wn