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.
Chigger season can last from spring until autumn depending on temperatures in your region. — Barbara Gillette, The Spruce, 22 July 2026 Orders are expected to open in autumn, with first deliveries due in late 2026 or early 2027. — Matthew MacConnell, Forbes.com, 21 July 2026 There are definitely options to give your garden visual interest through autumn, providing pretty color until at least the first fall frost. — Alexandra Kelly, Martha Stewart, 21 July 2026 This method is fast to install; however, in autumn, separating the plants from the netting is cumbersome. — Andy Wilcox, Better Homes & Gardens, 21 July 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 26 Jul. 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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