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[sep-tem-ber] /sɛpˈtɛm bər/
the ninth month of the year, containing 30 days.
Abbreviation: Sept., Sep.
before 1050; Middle English Septembre, Old English < Latin September seventh month in the early Roman calendar; for formation see December
Related forms
[sep-tem-bruh l] /sɛpˈtɛm brəl/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for September
  • It is still held to this day, but earlier in the year at the beginning of September.
  • It hosts the twin falls county fair and rodeo every September.
  • After eighty days the government agreed to enter into talks in September.
  • There is an annual television festival in the last week in September.
British Dictionary definitions for September


the ninth month of the year, consisting of 30 days
Word Origin
Old English, from Latin: the seventh (month) according to the original calendar of ancient Rome, from septem seven
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
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Word Origin and History for September

late Old English, from Latin September (also source of Old French Septembre, Spanish Setiembre, Italian Settembre, German September), from septem "seven" (see seven). So called because it was the seventh month of the old Roman calendar, which began the year in March; Julian calendar reform (46 B.C.E.) shifted the new year back two months. For -ber suffix, see December. Replaced Old English hærfestmonað, haligmonað. Related: Septembral.

Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Article for September

ninth month of the Gregorian calendar. Its name is derived from septem, Latin for "seven," an indication of its position in the early Roman calendar.

Learn more about September with a free trial on
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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