\ ˈkü How to pronounce coo (audio) \
cooed; cooing; coos

Definition of coo

 (Entry 1 of 2)

intransitive verb

1 : to make the low soft cry of a dove or pigeon or a similar sound The baby cooed quietly in her crib.
2 : to talk fondly, amorously, or appreciatively The family cooed over the baby pictures.

Definition of COO (Entry 2 of 2)

chief operating officer

Other Words from coo


coo noun

Examples of coo in a Sentence

Verb The baby cooed quietly in her crib. The baby was making a cooing sound. They all cooed over the baby pictures. “Oh, how sweet,” she cooed.
Recent Examples on the Web: Verb The voting comes complete with photos of the bears and their winter weight, always causing mass excitement on the internet as folks coo over the giant animals. Leah Asmelash, CNN, 3 Oct. 2021 Then drive over to Western Culture Farmstead & Creamery for some fresh feta and chevre and to coo over the adorable baby goats ( Ryan Haase, WSJ, 13 May 2021 Our favorite amphibians kiss and coo over their baby. Lauren Morgan,, 13 Nov. 2020 The high point of the celebration always was a new baby to coo over. Vincent T. Davis,, 28 Sep. 2020 Mering and Heidecker coo the tune, like parents singing a baby to sleep. Washington Post, 25 Sep. 2020 Selvi was more interested in her caregiver than the strangers cooing at her through a screen 8,000 miles away. Maria Abi-habib, New York Times, 6 May 2020 Selena Gomez coos about self-care over music that inspires only slight sashays. Spencer Kornhaber, The Atlantic, 19 Mar. 2020 So, rather than coo to their 6-month-old grandson in his highchair, Colleen and Mark Shere will wave at him through a window. Holly V. Hays, Indianapolis Star, 7 Apr. 2020 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'coo.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of coo


1577, in the meaning defined at sense 1

History and Etymology for coo



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Cite this Entry

“Coo.” Dictionary, Merriam-Webster, Accessed 26 Sep. 2022.

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More Definitions for coo


\ ˈkü How to pronounce coo (audio) \
cooed; cooing

Kids Definition of coo

 (Entry 1 of 2)

1 : to make the soft sound made by doves and pigeons or a similar sound
2 : to talk or say fondly or lovingly "Hush now," she cooed to her baby.


plural coos

Kids Definition of coo (Entry 2 of 2)

: a sound of or similar to that made by doves and pigeons

More from Merriam-Webster on coo

Thesaurus: All synonyms and antonyms for coo

Nglish: Translation of coo for Spanish Speakers

Britannica English: Translation of coo for Arabic Speakers


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