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

Nouns

• moos
  plural

Participles

• mooing
  present
• mooed
  past

Conjugated Forms

Present

• moo
  simple
• moos
  simple
• have mooed
  perfect
• has mooed
  perfect
• am mooing
  progressive
• are mooing
  progressive
• is mooing
  progressive
• have been mooing
  perfect progressive
• has been mooing
  perfect progressive

Past

• mooed
  simple
• had mooed
  perfect
• was mooing
  progressive
• were mooing
  progressive
• had been mooing
  perfect progressive

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

A distant moo came from beyond a hill.

From The Wall Street Journal • Jul. 2, 2026

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

“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

Alsop took a painterly approach to Mahler’s many details — birdsong and bells, dewdrop harps, the lowing moo of a tuba.

From Washington Post • Feb. 20, 2023

Then Dad placed his credit card on the table before getting up to wash the moo shu off his hands.

From "The Thing About Jellyfish" by Ali Benjamin