\ ˈmü How to pronounce moo (audio) \
mooed; mooing; moos

Definition of moo

intransitive verb

: to make the throat noise of a cow

Keep scrolling for more

Other Words from moo

moo noun

Examples of moo in a Sentence

Recent Examples on the Web But getting the animals to calm down can be difficult when they are distracted by herdmates mooing or baaing in the distance. Dionne Searcey, New York Times, "With County Fairs Off, Children Show Their Cows and Sheep Virtually," 13 May 2020 Innocent Ntirengaya’s request to marry Divine Uwamahoro is accepted, and so is the dowry—eight cows that have been mooing for hours in a nearby pasture. Caterina Clerici & Eléonore Hamelin, Marie Claire, "Rwanda's Future Is Female," 1 Feb. 2019 The animals mooed their dissent but finally boarded the trailer. NBC News, "Best advice to U.S. dairy farmers? 'Sell out as fast as you can'," 30 June 2018 But some cows — not all, as activists like to claim — cry (or moo mournfully) when their young are taken away. Mark Kurlansky, Time, "Why We've Been Fighting About Milk for 10,000 Years," 7 May 2018 The cow brought in to provide fresh milk for the cafe has been mooing all night. Bloomberg News, The Denver Post, "A luxury desert camp … and religious police? Tourism in Saudi Arabia may be hard sell," 2 Mar. 2017

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

See More

First Known Use of moo

1549, in the meaning defined above

History and Etymology for moo


Keep scrolling for more

Learn More about moo

Statistics for moo

Cite this Entry

“Moo.” Dictionary, Merriam-Webster, Accessed 23 Sep. 2020.

Keep scrolling for more

More Definitions for moo


\ ˈmü How to pronounce moo (audio) \
mooed; mooing

Kids Definition of moo

 (Entry 1 of 2)

: to make the sound of a cow : low


plural moos

Kids Definition of moo (Entry 2 of 2)

: the low sound made by a cow

More from Merriam-Webster on moo

Thesaurus: All synonyms and antonyms for moo

Nglish: Translation of moo for Spanish Speakers

Comments on moo

What made you want to look up moo? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Homophone Quiz

  • three bears two of them look like theyre whispering to a third bear who looks chuffed to be the center of attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!