Coo (?), v. i. [imp. & p. p.Cooed (?); p. pr. & vb. n.Cooing.] 1. To make a low repeated cry or sound, like the characteristic note of pigeons or doves.
The stockdove only through the forest cooes,
Mournfully hoarse.
Thomson.
2. To show affection; to act in a loving way. See under Bill, v. i. “Billing or cooing.” Byron.