\ 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

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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.
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Recent Examples on the Web: Verb Tiny, ceramic doves hitched a ride under his radio, which was no match for the soundtrack of cooing pigeon cargo. Elizabeth Hernandez,, "Colorado man’s homing pigeons a personal salvation," 1 Aug. 2019 The scuffed-up soul samples, with sweeping strings, cooing vocalists and swaying guitar washes set up hypnotic backdrops for Stalley’s steady and controlled lyricism. John Adamian,, "Rapper Stalley performing at the State House," 6 Dec. 2019 Now, your next line is where this conversation gets difficult: An owl coos, branched, in the night. Evan Waite River Clegg, The New Yorker, "This Poem’s Gonna Be a Hit!," 10 Dec. 2019 Baby Yoda, by contrast, doesn’t seem to have advanced beyond cooing and baby gibberish. Eric Spitznagel, Popular Mechanics, "An Alarmingly Deep Dive Into the Science of Baby Yoda," 2 Dec. 2019 There would be cooing from the child, bundled against the cold in the bassinet made of luxurious furs, lying next to the maker of the parka. Steve Meyer, Anchorage Daily News, "When it comes to displays of hunting culture, a roadhouse or farmhouse can fare well against big-city museums," 16 Nov. 2019 Soon with a cooing little one to bounce on their knees, the whole atmosphere brightened. NBC News, "As Asian Americans age, many look for options that allow them to remain in their homes," 26 Sep. 2019 The crowd hooted and cooed when an especially striking yellow dress appeared, like a mustard sunrise. Troy Patterson, The New Yorker, "A Message of Useful Beauty from New York Fashion Week," 10 Sep. 2019 When a parent responds to a baby’s coos or cries by picking them up or playing peak-a-boo with them for example, the back-and-forth helps build the baby’s brain architecture, which is later tied to children’s learning, behavior, and health outcomes. Annabelle Timsit, Quartz, "Smartphones are disrupting the crucial connections between parents and their babies," 31 July 2019

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.

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First Known Use of coo


1577, in the meaning defined at sense 1

History and Etymology for coo



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Statistics for coo

Last Updated

11 Feb 2020

Cite this Entry

“Coo.” Dictionary, Merriam-Webster, Accessed 19 Feb. 2020.

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More Definitions for coo

Financial Definition of COO

What It Is

The chief operating officer (COO) is responsible for executing and implementing the operational directives set by the CEO and the board of directors. Whereas the CEO is responsible for the overall leadership of the company, the COO is responsible for the day-to-day execution.

How It Works

The COO works for the CEO. Often, the board of directors has a role in the selection of the COO. The COO is often viewed as the CEO's second in command.

There is a lot of variety in the COO's job across industries and companies, but in general the COO oversees a company's operations on a more detailed basis than the CEO. The COO also translates the board's and the CEO's strategic objectives into executable plans.

For example, if one of the company's objectives is to increase customer satisfaction, the COO works with the appropriate departments to execute the plan and devises ways to measure and control the progress. The COO then monitors those measurements over time, advises the CEO and board on certain issues and reports back to the CEO on the status of the progress toward the strategic goal.

If companies were ships, the CEO would be the captain, deciding where the ship is going and standing on deck to ensure things were moving in the right direction. The COO would be below deck making sure everyone is rowing in the right direction, measuring resource levels, making sure everybody understood what to do and calculating how long it should be until the ship reached its destination.

Why It Matters

COOs are behind-the-scenes people with a lot of responsibility. They are "go-to" people who are critical to effective organizations. The best COOs work with the culture of the organization to get things done according to its strategic vision and the directives set forth by the CEO.

It is very important that the COO is able to trust and work well with the CEO and CFO. The COO must be able to persuade and motivate people toward action; must be able to manage a wide range of departments; and must be able to do so within financial constraints.

Source: Investing Answers


How to pronounce COO (audio)

English Language Learners Definition of coo

: to make the soft sound of a dove or pigeon also : to make a similar sound
: to talk in a soft, quiet, and loving way


\ 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

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More from Merriam-Webster on coo

Rhyming Dictionary: Words that rhyme with coo

Spanish Central: Translation of coo

Nglish: Translation of coo for Spanish Speakers

Britannica English: Translation of coo for Arabic Speakers

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