Definition of moo
: to make the throat noise of a cow
Recent Examples of moo from the Web
The cow brought in to provide fresh milk for the cafe has been mooing all night.
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.
Origin and Etymology of moo
First Known Use: 1549See Words from the same year
MOO Defined for Kids
Definition of moo for Students
: the low sound made by a cow
Seen and Heard
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