[ koo ]
/ ku /

verb (used without object), cooed, coo·ing.

to utter or imitate the soft, murmuring sound characteristic of doves.
to murmur or talk fondly or amorously.

verb (used with object), cooed, coo·ing.

to utter by cooing.


a cooing sound.

Nearby words

  1. conway,
  2. conway, thomas,
  3. conwy,
  4. cony,
  5. conybeare,
  6. cooboo,
  7. cooch,
  8. cooch behar,
  9. coochie,
  10. cooee

Origin of coo

First recorded in 1660–70; imitative

Related formscoo·er, nouncoo·ing·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for cooing

British Dictionary definitions for cooing


/ (kuː) /

verb coos, cooing or cooed

(intr) (of doves, pigeons, etc) to make a characteristic soft throaty call
(tr) to speak in a soft murmur
(intr) to murmur lovingly (esp in the phrase bill and coo)


the sound of cooing


British slang an exclamation of surprise, awe, etc
Derived Formscooer, nouncooingly, adverb


abbreviation for

cost of ownership


abbreviation for

chief operating officer
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

Word Origin and History for cooing



1660s, echoic of doves; the phrase to bill and coo is first recorded 1816. Related: Cooing. The noun is recorded from 1729.

Online Etymology Dictionary, © 2010 Douglas Harper