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

There’s a good shot that will happen next year with the FIBA World Cup taking place in early September. —Doug Feinberg, Chicago Tribune, 20 July 2025

The only recent exception was the iPhone 13 Pro and Pro Max, when the initial September 2021 range of four colors had a handsome alpine green hue added six months later. —David Phelan, Forbes.com, 19 July 2025

If it is approved, Evelyn and Dagg Park visitors could play on the new swing as early as September. —Alecia Taylor, Kansas City Star, 19 July 2025

In September that year, the Dreyer joined NBC News from Boston local news station WHDH, where the pair started dating and Dreyer had worked since 2007. —Jay Stahl, USA Today, 19 July 2025

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

• 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.