supposition

noun

sup·​po·​si·​tion ˌsə-pə-ˈzi-shən How to pronounce supposition (audio)
1
: something that is supposed : hypothesis
2
: the act of supposing
suppositional adjective

Examples of supposition in a Sentence

a supposition that proved correct This is just idle supposition.
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.
In Beth Is Dead, a new YA thriller out Jan. 6, that's exactly the supposition at the heart of this reimagining of Louisa May Alcott's literary classic. Maureen Lee Lenker, EW.com, 11 June 2025 That’s a supposition supported, if not proven, by increases in U.S. imports from Vietnam, Taiwan, Japan and other countries corresponding to declines in specific commodities from China. Ken Roberts, Forbes.com, 4 June 2025 In ordinary times, the likes of Dawn would be dismissed as crackpots, but in pandemic limbo, with everyone bored and at a loose end, her weird suppositions start to get traction, sending everyone down internet rabbit holes. Damon Wise, Deadline, 16 May 2025 This supposition might seem fanciful, but let’s fantasize. Dylan Matthews, Vox, 7 Dec. 2018 See All Example Sentences for supposition

Word History

Etymology

Middle English supposicioun, from Anglo-French supposicion, from Late Latin supposition-, suppositio, from Latin, act of placing beneath, from supponere

First Known Use

15th century, in the meaning defined at sense 1

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

Browse Nearby Words

Cite this Entry

“Supposition.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/supposition. Accessed 19 Jun. 2025.

Kids Definition

supposition

noun
sup·​po·​si·​tion ˌsəp-ə-ˈzish-ən How to pronounce supposition (audio)
1
: something that is supposed
2
: the act of supposing
suppositional
-ˈzish-nəl How to pronounce supposition (audio)
-ən-ᵊl
adjective

More from Merriam-Webster on supposition

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