Found 2 items, similar to coo.
English → English (WordNet) Definition: coo coo n : the sound made by a pigeon coo v 1: speak softly or lovingly; “The mother who held her baby was cooing softly” 2: cry softly, as of pigeons
English → English (gcide) Definition: Coo Coo \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. [1913 Webster] The stockdove only through the forest cooes, Mournfully hoarse. --Thomson. [1913 Webster] 2. To show affection; to act in a loving way. See under Bill, v. i. “Billing or cooing.” --Byron. [1913 Webster]