presupposition

noun

Definition of presuppositionnext
as in assumption
something taken as being true or factual and used as a starting point for a course of action or reasoning the cynic's presupposition that everyone acts out of purely selfish motives

Synonyms & Similar Words

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Example Sentences

Recent Examples of Synonyms for presupposition
  1. assumption
  2. theory
Noun
  • Russia’s invasion of Ukraine ended the assumption that energy infrastructure could be insulated from geopolitics.
    — Sam Birchall, Fortune, 2 Oct. 2026
  • Zahir Islam, PhD, a physicist at ANL, and co-author of the study, said the finding challenges a common assumption in microelectronics that the substrate beneath a thin film simply acts as a passive support.
    — Georgina Jedikovska, Interesting Engineering, 2 Oct. 2026
Definition of assumption
Noun
  • Some universities have a long standing tradition of continually testing students’ ability to explain and rationalise their theories.
    — Reynald Fasciaux, Fortune, 8 Oct. 2026
  • The defense said the government’s theory is unsupported and urged the judge to dismiss the charges.
    — Kaelan Deese, The Washington Examiner, 7 Oct. 2026
Definition of theory
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.

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Cite this Entry

“Presupposition.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/presupposition. Accessed 10 Oct. 2026.

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