Breadcrumb Home > Thesaurus > C Synonyms of coo Find synonyms for: Noun 1. coo, cry usage: the sound made by a pigeon Verb 1. coo, murmur usage: speak softly or lovingly; "The mother who held her baby was cooing softly" 2. coo, utter, emit, let out, let loose usage: cry softly, as of pigeons WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of coo (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: felicitous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language