September

noun

Sep·​tem·​ber sep-ˈtem-bər 

səp-

: the ninth month of the Gregorian calendar

Examples of September in a Sentence

The weather has been very mild during the past two Septembers.

Recent Examples on the Web

Meghan was last in the United Kingdom in September 2022 for Queen Elizabeth's funeral. —Ralphie Aversa, USA Today, 20 June 2026

The Air Force has been modifying the plane since last September. —Isabella Murray, ABC News, 19 June 2026

In September 2023, several people were injured after two trains collided at Aviemore railway station in the Highlands of Scotland. —CBS News, 19 June 2026

In the 4700 block of Newhaven Street, in September 2025, a 2,180-square-foot single-family house was sold for $1,680,000, a price per square foot of $771. —Bay Area Home Report, Mercury News, 19 June 2026

Word History

Etymology

Middle English Septembre, from Anglo-French & Old English, both from Latin September (seventh month), from septem seven — more at seven

First Known Use

before the 12th century, in the meaning defined above

Rhymes for September

• crewmember
• december
• dismember
• nonmember
• november
• remember
• ember
• member

Kids Definition

September

noun

Sep·​tem·​ber sep-ˈtem-bər 

səp-

: the ninth month of the year

Etymology

Middle English Septembre "the month of September," from Old English September and early French Septembre (both, same meaning), both from Latin September "the seventh month," from septem "seven"

Word Origin

The ancient Romans originally used a calendar which began the year with the month of March. The seventh month of the year was called September, from septem, a Latin word meaning "seven." The name was spelled Septembre when it was borrowed from early French into Middle English, but eventually the English spelling was changed to that of the original Latin.