Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “September”


noun [C or U] uk   /sepˈtem.bər/ us    /-bɚ/ (written abbreviation Sept.)
A1 the ninth month of the year, after August and before October: My mother's birthday is in September. School starts on 3 September. Claudia is starting school next September.Names of months
(Definition of September from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of September?
Add Cambridge dictionaries to your browser to your website

Definitions of “September” in other dictionaries

Word of the Day


to send something through the air with force, especially by a sudden movement of the arm

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