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October

[ok-toh-ber]
noun
  1. the tenth month of the year, containing 31 days. Abbreviation: Oct.
  2. British. ale or beer traditionally brewed in this month.
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Origin of October

before 1050; Middle English, Old English < Latin Octōber the eighth month of the early Roman year, equivalent to octō- octo- + -ber, on the model of September, November, December; see December
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for october

October

noun
  1. the tenth month of the year, consisting of 31 days
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Word Origin for October

Old English, from Latin, from octo eight, since it was the eighth month in Roman reckoning
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

Word Origin and History for october

October

c.1050, from Latin October (mensis), from octo "eight," from PIE root *octo(u)- "eight" (see eight). Eighth month of the old Roman calendar (pre-46 B.C.E.), which began the year in March. For -ber see December. Replaced Old English winterfylleð. In Russian history, October Revolution (in which the Bolsheviks overthrew the Provisional Government) happened Nov. 7, but because Russia had not at that time adpoted the Gregorian calendar reform, this date was reckoned there (Old Style) as Oct. 25.

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Online Etymology Dictionary, © 2010 Douglas Harper