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coo1

[koo]
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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.
noun
  1. a cooing sound.

Origin of coo1

First recorded in 1660–70; imitative
Related formscoo·er, nouncoo·ing·ly, adverb

coo2

[koo]
interjection British Slang.
  1. (used to express surprise or amazement.)

Origin of coo2

First recorded in 1910–15; origin uncertain

Coo

[kaw-aw]
noun
  1. Italian name of Kos.

COO

  1. chief operating officer.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for coo

coo

verb coos, cooing or cooed
  1. (intr) (of doves, pigeons, etc) to make a characteristic soft throaty call
  2. (tr) to speak in a soft murmur
  3. (intr) to murmur lovingly (esp in the phrase bill and coo)
noun
  1. the sound of cooing
interjection
  1. British slang an exclamation of surprise, awe, etc
Derived Formscooer, nouncooingly, adverb

CoO

abbreviation for
  1. cost of ownership

COO

abbreviation for
  1. 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 coo

v.

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

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