As a noun koo
is .
As a pronoun moo is
we.
koo
Not English
Koo has no English definition. It may be misspelled.
English words similar to 'koo':
ko,
kayo
moo
English
Noun
(
en noun)
(onomatopoeia) The characteristic sound made by a cow or bull.
A foolish woman.
- You silly moo ! What did you do that for?
Verb
(
en verb)
Of a cow or bull, to make its characteristic sound.
Synonyms
* low
Interjection
(
en interjection)
The characteristic sound made by a cow or bull.