[ 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

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

  • Round Villa Rubein the pigeons cooed uneasily, all the other birds were silent.

  • "I don't want you to feel you have anything against me," he cooed still more softly.

    The Regent | E. Arnold Bennett
  • White doves flitted about the building, or cooed their drowsy love-song, perched peacefully on pinnacle and shaft.

    Sarchedon | G. J. (George John) Whyte-Melville

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