sup·​po·​si·​tion | \ ˌsə-pə-ˈzi-shən How to pronounce supposition (audio) \

Definition of supposition

1 : something that is supposed : hypothesis
2 : the act of supposing

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Other Words from supposition

suppositional \ ˌsə-​pə-​ˈzish-​nəl How to pronounce supposition (audio) , -​ˈzi-​shə-​nᵊl \ adjective

Synonyms for supposition


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Examples of supposition in a Sentence

a supposition that proved correct This is just idle supposition.
Recent Examples on the Web The supposition that an earlier and stricter shutdown would have appreciably suppressed the virus may be a comforting counterfactual but bears no relationship to observable reality. Barton Swaim, WSJ, "‘The Premonition’ Review: A Pandemic of Experts," 3 May 2021 These short stories share a common through line of death and darkness, and they’re written from the supposition that day-to-day life isn’t mundane, but aggressively (and hilariously) cruel. Brian Boone, Vulture, "The Best Comedy Books of 2021 (So Far)," 7 Apr. 2021 Critics say the state is embarking on a wholesale war on wildlife that is based on little more than emotion and supposition, and rejecting decades worth of management lessons. New York Times, "In Montana, Bears and Wolves Become Part of the Culture Wars," 28 Mar. 2021 Quantum computers, or quantum processing units (QPUs), utilize qubits which can be ones, zeros or a supposition of two. Ari Zoldan, Forbes, "Quantum Computing: How It May Change The Face Of Your Business (Forever)," 12 Mar. 2021 The QAnon theory rests on the supposition that a government agent with top-secret Q-level security clearance has been posting cryptic messages on online bulletin boards that hint at happenings going on behind the scenes. Richard Ruelas, The Arizona Republic, "Arizona-based QAnon interpreter, militia mobilizer, other pages taken off of Facebook during crackdown," 9 Oct. 2020 Much of the criticism surrounding People of Praise rests on Feinstein’s supposition that, as a judge, Barrett would allow her spiritual beliefs and practices to influence her rulings. Nicholas Rowan, Washington Examiner, "Four myths about the People of Praise, explained," 30 Sep. 2020 Barometer's second-round surveys now ask respondents to name the date of the general election, on the supposition that anyone who can likely plans to cast a ballot. Arielle Pardes, Wired, "The Facebook Defectors Turning Trump’s Strategy Against Him," 15 Sep. 2020 But Kondo, as a theorist and not an experimentalist, was not the first to show that his supposition was correct. Kenneth Chang, Star Tribune, "'I'm not a quitter': Myriam Sarachik never gave up on physics," 3 Sep. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'supposition.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of supposition

15th century, in the meaning defined at sense 1

History and Etymology for supposition

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

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Time Traveler for supposition

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

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Statistics for supposition

Last Updated

10 May 2021

Cite this Entry

“Supposition.” Dictionary, Merriam-Webster, Accessed 14 May. 2021.

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More Definitions for supposition



English Language Learners Definition of supposition

: an idea or theory that you believe is true even though you do not have proof

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