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

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.
For warm weather without the peak summer crowds, visit Seattle in late spring or early fall; autumn also brings several art and music festivals to the city. Scott Bay, Travel + Leisure, 4 Jan. 2026 Meanwhile, the Buffs are going to need to import at least 30, and maybe 35-45 transfers, just to fill out a roster whose depth was frequently tested last autumn. Sean Keeler, Denver Post, 4 Jan. 2026 The skeletal trees, stripped of their summer green and fiery autumn leaves, stand in a white shroud of snow like stoic models of resilience and grace. Thomas Cangelosi, Hartford Courant, 4 Jan. 2026 There were around 80 business leaders in the room on that autumn day in London’s financial district. Simon Perry, PEOPLE, 2 Jan. 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

Cite this Entry

“Autumn.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/autumn. Accessed 7 Jan. 2026.

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 adjective

More from Merriam-Webster on autumn

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