Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “mammal”


noun [C]  /ˈmæm·əl/ us  
biology any animal in which the female gives birth to babies, not eggs, and feeds them on milk from her own body
(Definition of mammal from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of mammal?
Browse related topics

You are looking at an entry to do with Plants & animals - general words, but you might be interested in these topics from the Animals generally topic area:

Add Cambridge dictionaries to your browser to your website

Definitions of “mammal” in other dictionaries

Word of the Day


a measure for liquid equal to about half a litre

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More