coo
Concise Oxford English Dictionary © 2008 Oxford University Press:
coo1
▶verb (coos, cooing, cooed)
- 1 (of a pigeon or dove) make a soft murmuring sound.
- 2 speak in a soft gentle voice.
– origin C17: imitative.
Concise Oxford English Dictionary © 2008 Oxford University Press:
coo2
▶exclamation Brit. informal used to express surprise.
– origin early 20th cent.: imitative.
'coo' also found in these Oxford entries:

