moo

American  

[moo] / mu /

verb (used without object)

moos, present (3rd person singular) mooed, past participle, past mooing present participle

1. to utter the characteristic deep sound of a cow; low.

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noun

moos plural

1. a mooing sound.

moo British  

/ muː /

verb

1. (intr) (of a cow, bull, etc) to make a characteristic deep long sound; low

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interjection

1. an instance or imitation of this sound

Other Word Forms

Inflected Forms

noun

• moos
  plural

Conjugated Forms

Present

• have mooed
  perfect
• has mooed
  perfect 3rd person singular
• has been mooing
  perfect progressive 3rd person singular
• is mooing
  progressive 3rd person singular
• have been mooing
  perfect progressive
• moos
  singular 3rd person
• am mooing
  progressive 1st person singular
• mooing
  participle
• are mooing
  progressive

Past

• had mooed
  perfect
• were mooing
  progressive plural
• had been mooing
  perfect progressive
• was mooing
  progressive singular
• mooed
  participle
• mooed
  simple

Future

• will moo
  simple
• will have mooed
  perfect
• will be mooing
  progressive
• will have been mooing
  perfect progressive

Etymology

Origin of moo

First recorded in 1540–50; imitative

Example Sentences

With the afternoon sun beating down while the cows snort and moo, the workers inspect and clean the animals' teats, which are then attached to milking equipment.

From BBC • Feb. 19, 2026

In addition to a “HYEWEST” vanity plate and longhorns on the front, there was a button inside that would make the car moo.

From Los Angeles Times • Mar. 18, 2025

“They moo a lot and poop a bit, but other than that, they’re pretty good workers,” Yancey says.

From Seattle Times • Aug. 18, 2023

From kefta kebabs and tandoori chicken skewers to lamb souvlaki, Thai moo ping and negima yakitori, my hand will always gravitate to anything grilled on a stick.

From Washington Post • Aug. 7, 2022

Emma and Lisa-Marie Anne stay for dinner—Aunt Melissa ordered take-out instead of cooking for once—and the five of us exchange sneaky looks while passing cartons of kung pao chicken, moo shu pork, and broccoli beef.

From "South of Somewhere" by Kalena Miller