[ koo ]
See synonyms for coo on
verb (used without object),cooed, coo·ing.
  1. to utter or imitate the soft, murmuring sound characteristic of doves.

  2. to murmur or talk fondly or amorously.

verb (used with object),cooed, coo·ing.
  1. to utter by cooing.

  1. a cooing sound.

Origin of coo

First recorded in 1660–70; imitative

Other words from coo

  • coo·er, noun

Words Nearby coo

Other definitions for coo (2 of 4)

[ koo ]

interjectionBritish Slang.
  1. (used to express surprise or amazement.)

Origin of coo

First recorded in 1910–15; origin uncertain

Other definitions for Coo (3 of 4)

[ kaw-aw ]

  1. Italian name of Kos.

Other definitions for COO (4 of 4)


  1. chief operating officer. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use coo in a sentence

  • He soon sends them flying back to their house on the roof, where they chatter and coo in great excitement.

    Seven O'Clock Stories | Robert Gordon Anderson
  • About half-past three, the doves began to coo, and that made the monkey sit up and listen.

    Kari the Elephant | Dhan Gopal Mukerji
  • I'm the oldest girl at Miss Waring's—locked up there with a lot of little pigeons that coo every time you look at them.

    A Hoosier Chronicle | Meredith Nicholson
  • We were now about one hundred and fifty yards away, and I suddenly leapt to my feet and coo-eed several times.

  • Arrived there, she stopped for breath for a while, and then sent forth a long "coo-ie."

British Dictionary definitions for coo (1 of 3)


/ (kuː) /

verbcoos, cooing or cooed
  1. (intr) (of doves, pigeons, etc) to make a characteristic soft throaty call

  2. (tr) to speak in a soft murmur

  1. (intr) to murmur lovingly (esp in the phrase bill and coo)

  1. the sound of cooing

  1. British slang an exclamation of surprise, awe, etc

Derived forms of coo

  • cooer, noun
  • cooingly, adverb

British Dictionary definitions for COO (2 of 3)


abbreviation for
  1. chief operating officer

British Dictionary definitions for CoO (3 of 3)


abbreviation for
  1. cost of ownership

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012