autumn

noun

au·​tumn ˈȯ-təm How to pronounce autumn (audio)
Synonyms of autumnnext
1
: the season between summer and winter comprising in the northern hemisphere usually the months of September, October, and November or as reckoned astronomically extending from the September equinox to the December solstice

called also fall

2
: a period of maturity or incipient decline
in the autumn of life

Synonyms of autumn

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Examples of autumn in a Sentence

in the autumn of last year a magnificent New England autumn She went off to college in the autumn of 1999. When autumn came he planted grass.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This autumn, the brand will open its first flagship at 35–37 Sloane Square in London, surrounded by premium lifestyle neighbours such as Tiffany & Co and Aesop. — Kate Hardcastle, Forbes.com, 13 Aug. 2026 Russian lawmaker Andrei Gurulyov brushed off reports of a possible autumn mobilization. — ABC News, 12 Aug. 2026 For all of us hankering after a more expressive, carefree time, here are the nine ’90s nail designs made modern for autumn 2025. — Jeanne Ballion, Vogue, 10 Aug. 2026 For hairstylist Natty Jackson, autumn is the ultimate time to make the chop. — Calin Van Paris, InStyle, 9 Aug. 2026 See All Example Sentences for autumn

Word History

Etymology

Middle English autumpne, borrowed from Anglo-French autompne, borrowed from Latin autumnus (also an adjective, "autumnal"), perhaps a borrowing from Etruscan

Note: Ernout and Meillet (Dictionaire étymologique de la langue latine) regard an Etruscan origin as definite ("sans doute") and compare the form to Vertumnus/Vortumnus, claimed by Varro to be an Etruscan god. (The Romans regarded Vertumnus as a god of the changing seasons, by association with the verb vertere "to turn.")

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of autumn was in the 15th century

Phrases Containing autumn

Rhymes for autumn

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Browse Nearby Words

autres temps, autres mœurs
autumn
autumn Adonis
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Cite this Entry

“Autumn.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/autumn. Accessed 13 Aug. 2026.

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Kids Definition

autumn

noun
au·​tumn ˈȯt-əm How to pronounce autumn (audio)
1
: the season between summer and winter including in the northern hemisphere usually the months of September, October, and November

called also fall

2
: a time late in an existence
in the autumn of life
autumnal
ȯ-ˈtəm-nəl How to pronounce autumn (audio)
adjective

More from Merriam-Webster on autumn

Nglish: Translation of autumn for Spanish Speakers

Britannica.com: Encyclopedia article about autumn

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