# moo

/ˈmu/ (US) · /mˈuː/ (UK) · CEFR A2 · Noun

Source: https://englishreference.com/word/moo
Updated: 2026-05-08

## Definition

the low, deep sound that a cow makes. You use this word to describe the noise of cattle.

For teachers: the characteristic low, deep vocalisation produced by cattle. Often used onomatopoeically in children's literature or to describe the sound of a herd.

## Examples

- The cow gives a loud moo when it sees the farmer.
- We woke up early to the sound of a distant moo coming from the neighbor's pasture.
- The silence of the rural evening was interrupted only by the occasional, resonant moo of a cow grazing near the fence.

## Usage notes

- Often used as an onomatopoeia; can also function as a verb meaning to make this sound.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.