oo

oo · noun¹

Representation of a long-o sound.

oo · noun²

1. Hawaiian · borrowed fromʻōʻō
2. English todayoo

From Hawaiian ʻōʻō, resembling its call.

oo · interjection³

See ooh.

Words from the same roots

First known use, by meaning

• 14th–16th c. (Ω, ω) The Greek letter omega.
• from 19th c. Any of four Hawaiian birds of the genus Moho, formerly classed with the honeyeaters and now believed to be extinct.