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coo

verb (used without object)

to utter or imitate the soft, murmuring sound characteristic of doves.

to murmur or talk fondly or amorously.

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verb (used with object)

to utter by cooing.

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Coo is one of our favorite verbs.

So is yaff. Does it mean:

to bark; yelp.

to run away hurriedly; flee.

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noun

a cooing sound.

Origin:
1660–70; imitative

Related forms

coo·er, noun

coo·ing·ly, adverb

Example Sentences

The red-faced monkeys frequently utter what researchers have dubbed coo calls to maintain vocal contact with one another.

Until now, she's a little baby to cuddle and coo over.

The scientists focused on female macaques because they are the main coo callers.

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Dictionary.com Unabridged

interjection British Slang.

(used to express surprise or amazement.)

Origin:
1910–15; origin uncertain

noun

Italian name of Kos.

chief operating officer.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To coo

Collins

World English Dictionary

coo (kuː)

—vb , coos, cooing, 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)

—n
4.	the sound of cooing

—*interj*
5.	slang (Brit) an exclamation of surprise, awe, etc

'cooer

—n

'cooingly

—*adv*

CoO

—*abbreviation for*
	cost of ownership

COO

—*abbreviation for*
	chief operating officer

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

coo

1670, echoic; the phrase to bill and coo is first recorded 1816. Related: Cooing (1660s).

American Heritage

Abbreviations & Acronyms

COO
chief operating officer