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September

American  
[sep-tem-ber] / sɛpˈtɛm bər /

noun

  1. the ninth month of the year, containing 30 days. Sept., Sep.


September British  
/ sɛpˈtɛmbə /

noun

  1. the ninth month of the year, consisting of 30 days

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

What is September? September is the ninth month of the year in the Gregorian calendar. It has 30 days and is between August and October.In the Northern Hemisphere, September is known as the first month of the autumn season, while in the Southern Hemisphere, it’s the first month of the spring season.Much of the world celebrates International Workers Day in May, but in the United States and Canada, a similar celebration, called Labor Day, is held. It is celebrated on the first Monday of September.The Jewish holiday Rosh Hashanah, which marks the beginning of the year, is normally held in September. The holiday’s exact date changes because it is set according to the Hebrew calendar, which is based on the Moon’s cycle.Example: For many people, September is a calm month before the holidays in October, November, and December.

Other Word Forms

  • Septembral adjective

Etymology

Origin of September

First recorded before 1050; Middle English Septembre, Old English, from Latin September “seventh month” in the early Roman calendar; for formation December

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Kalshi’s market differed slightly, with users able to take bets on whether he would be out by September, July, or April.

From The Wall Street Journal

Ethan remained at the facility until September 2025 before being moved to a neurological care home while an extensive second independent assessment was carried out.

From BBC

In February, it was revealed that two employees of a Russian private security company were aboard another suspected Russian "shadow fleet" tanker seized by France in September.

From Barron's

The US Congress notably authorized the use of force in such a way after the September 11, 2011 attacks on the United States by Al-Qaeda.

From Barron's

That so-called squall was enough to fuel inflation in the U.S., with the core PCE price index rising at an annual pace of 5.6% in September 2022, its highest rate in almost 40 years.

From MarketWatch