birr
1. [ verb ] make a soft swishing sound, as of a motor working or wings flapping
Synonyms: whiz whir purr whirr whizz
Related terms: go whir whiz
2. [ noun ] sound of something in rapid motion
Synonyms: whirring whir whirr
Examples:

: "whir of a bird's wings" "the whir of the propellers"

Related terms: sound whizz
3. [ noun ] the basic unit of money in Ethiopia; equal to 100 cents
Related terms: Ethiopian_monetary_unit cent
Similar spelling:   Biro
  bier
  Bihar
  Biery
  Bieri
  Bihari