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

August 23 – September 22 A broader perspective helps something click into place today. —Tarot.com, New York Daily News, 2 May 2026

This is the last month (until September) in which this biggest of planets is high enough in a dark sky to permit crisp telescopic views of its cloud patterns and four big satellites. —Joe Rao, Space.com, 2 May 2026

Construction is expected to begin in May and be completed by September, according to the staff report. —R. Christian Smith, Chicago Tribune, 1 May 2026

In September 2022, Wittmer said, Harding called to tell him her husband was dead. —Sarah Rumpf-Whitten, FOXNews.com, 1 May 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

• 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.