(coos, cooing, cooed)
1.
When a dove or pigeon coos, it makes the soft sounds that doves and pigeons typically make.
Pigeons fluttered in and out, cooing gently.
VERB: V
2.
When someone coos, they speak in a very soft, quiet voice which is intended to sound attractive.
She paused to coo at the baby...
'Isn't this marvelous?' she cooed.
VERB: V at/over n, V with quote