Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “forty”


number uk   /ˈfɔː.ti/ us    /ˈfɔːr.t̬i/
A2 the number 40: thirty-nine, forty, forty-one He looks about forty.Cardinal numbers, including nought and zero
(Definition of forty from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of forty?
Add Cambridge dictionaries to your browser to your website

More meanings of “forty”

Definitions of “forty” 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