1
as in hypothesis
an idea that is the starting point for making a case or conducting an investigation my supposition is that this grape variety, which flourishes in southern France, should do equally well here, given the similar climate

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2
as in guess
an opinion or judgment based on little or no evidence it's pure supposition on your part that there's something illegal going on next door

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3

Example Sentences

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.
Recent Examples of supposition She’s bemused by suppositions about the advantages of her family legacy, which in reality boasts a centuries-deep ledger of addiction, estrangement, and untimely death. Holden Seidlitz, New Yorker, 5 Aug. 2025 But that premise assumes two suppositions not in evidence. Andre Mouchard, Oc Register, 4 Aug. 2025 The great flaw in that theory is the supposition of logic in humans. Yeo Boon Ping, CNBC, 11 July 2025 That's a double-digit decline compared to the same three months of last year—itself no peach of a quarter for a car company with a stratospheric valuation based on the supposition of eternal sales growth. ArsTechnica, 2 July 2025 See All Example Sentences for supposition
Recent Examples of Synonyms for supposition
Noun
  • For a discovery to count, the AI has to oversee the entire project, from hypothesis generation to experiment design to data analysis.
    Tom Chivers, semafor.com, 7 Oct. 2025
  • The new hypothesis about them is one of several novel ideas that theorists have been proposing since this spring, when the latest DESI results were published.
    Rebecca Boyle, Scientific American, 4 Oct. 2025
Noun
  • My guess is that Connor’s explosiveness determines his eventual decline from star winger to capable scorer, likely around age 33 or 34.
    Murat Ates, New York Times, 9 Oct. 2025
  • Why Roberts went to Blake Treinen and Alex Vesia first is anyone’s guess.
    Barry M. Bloom, Sportico.com, 8 Oct. 2025
Noun
  • Most of us remain trapped in our own language bubble and cultural assumptions, and the publishing industry is no exception.
    The Dial, The Dial, 7 Oct. 2025
  • The assumption is that viewers will bring their own answers to those questions — and that for myriad reasons, the series will be unwatchable for some audiences and a tough watch for everybody.
    Daniel Fienberg, HollywoodReporter, 7 Oct. 2025
Noun
  • The Nikumaroro theory suggests that Earhart and her navigator, Fred Noonan, landed on the island’s reef before their plane was swept away.
    Jesus Mesa, MSNBC Newsweek, 8 Oct. 2025
  • Although Robson took more than a decade to put his theory to the test, his experiments in the 1980s proved his hunch was correct.
    Katie Hunt, CNN Money, 8 Oct. 2025
Noun
  • Mathematicians were able to prove the triangulation conjecture for this version of the amplituhedron in 2021.
    Kevin Hartnett, Quanta Magazine, 6 Oct. 2025
  • People have seen slivers in movies like Paid in Full and read conjecture online, but beneath the surface is an entire world that hasn’t been seen before.
    Ryan Gajewski, HollywoodReporter, 25 Sep. 2025
Noun
  • Her thesis detailed the first five years of study at the Gombe reserve.
    Julia Jacobo, ABC News, 1 Oct. 2025
  • His thesis is that if the GOP sticks together, Senate Democrats would have to climb down and accept House Republicans’ spending bill to get through the next seven weeks.
    Philip Elliott, Time, 30 Sep. 2025
Noun
  • The court reinstated Proposition 4, which says congressional districts need to be drawn by an independent redistricting commission and cannot favor one party over the other, to rule that the 2021 map was drawn in violation of the proposition.
    Molly Parks, The Washington Examiner, 7 Oct. 2025
  • The company’s unique value proposition includes custom rug delivery in two to four weeks, an impressive timeline for any custom category.
    Lauren Parker, Footwear News, 6 Oct. 2025

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Cite this Entry

“Supposition.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/supposition. Accessed 13 Oct. 2025.

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