Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “mistress”


noun [C]     /ˈmɪstrəs/
a woman who has a sexual relationship with a man who is married to someone else Romantic and sexual partners
(Definition of mistress noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “mistress” in other dictionaries

Word of the Day


to pour liquid slowly over something, especially in a thin line or in small drops

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