Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “one”

one

number, determiner (MEMBER)    /wʌn/
one of A2 a member of a group of people or things: One of their daughters has just got married. EMI is one of the world's largest record companies. Finding a cure for cancer is one of the biggest challenges facing medical researchers. Our organization is just one of many charities that are providing famine relief in the region.Groups of people
(Definition of one numberdeterminer (MEMBER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of one

Definitions of “one” in other dictionaries

Word of the Day

closeness

the quality of knowing someone very well, liking them a lot, and wanting to spend a lot of time together

Word of the Day

Blog

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