oo
/ˈəʊ.əʊ/
Proposed by a contributor, not yet supported by evidence.
Also seen as: oos
Meaning · English
Any of four Hawaiian birds of the genus Moho, formerly classed with the honeyeaters and now believed to be extinct.
Noun
Examples
On this visit I made careful inquiries as to the success of Mr. Gay's efforts to raise the "Oo" bird on this island.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “oo” mean?
Any of four Hawaiian birds of the genus Moho, formerly classed with the honeyeaters and now believed to be extinct.
Is “oo” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.