v. i. | 1. | To make a low repeated cry or sound, like the characteristic note of pigeons or doves. |
2. | To show affection; to act in a loving way. See under Bill, |
Noun | 1. | coo - the sound made by a pigeon |
Verb | 1. | coo - speak softly or lovingly; "The mother who held her baby was cooing softly" |
2. | coo - cry softly, as of pigeons |