ASSUMPTION Synonyms: 137 Similar and Opposite Words

assumption

noun

ə-ˈsəm(p)-shən

Definition of assumption

as in theory

something taken as being true or factual and used as a starting point for a course of action or reasoning the widespread assumption that violent entertainment leads to violent behavior in children your argument is faulty because it's based on erroneous assumptions

Synonyms & Similar Words

Relevance

as in arrogance

an exaggerated sense of one's importance that shows itself in the making of excessive or unjustified claims his air of assumption tended to put people off rather quickly

Synonyms & Similar Words

Antonyms & Near Antonyms

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 assumption The guarantees apply only to specific properties, inputs, and assumptions described in each proof. — Aamir Khollam, Interesting Engineering, 22 Oct. 2026 But by the end of the film, Seyfried begins pushing Fielder on his allegiances and assumptions. — Kathryn Vanarendonk, Vulture, 22 Oct. 2026 The official said Salvadorean authorities were operating under the assumption that the four missing Salvadoreans are still alive. — ABC News, 22 Oct. 2026 Throughout the course of the campaign, candidates are making assumptions. — Ted Johnson, Deadline, 21 Oct. 2026 See All Example Sentences for assumption

Recent Examples of Synonyms for assumption

Noun

In September 2026 Huang and a few collaborators uploaded a proof that the historic equations represent a single case of a much grander geometrical theory.

— Lyndie Chiou, Scientific American, 29 Oct. 2026
But there are many theories about why people are attracted to true crime, with serial killers being the stars of that world.

— Rick Kogan, Chicago Tribune, 28 Oct. 2026

Definition of theory

Noun

McVay and Snead have effectively built a culture of arrogance.

— Los Angeles Times, Los Angeles Times, 24 Oct. 2026
These fascinating, illuminating episodes raise the question of whether great fiction requires the kind of single-mindedness and even arrogance that McCarthy cultivated.

— New York Times, New York Times, 8 Oct. 2026

Definition of arrogance

Noun

The fire damaged the premises of several commercial entities, authorities said.

— STEPHEN McGRATH, Arkansas Online, 28 Oct. 2026
Along with the prospect of ICE agents conducting immigration enforcement, election officials have also expressed concern that the federal government might try other ways to disrupt polling places, citing voter fraud allegations as a premise.

— Philip Wang, Time, 28 Oct. 2026

Definition of premise

Noun

Advertisement Thirdly, place names should not be used to proclaim cultural superiority, advance territorial ambitions, or assert exclusive national ownership over geographical spaces shared among different peoples.

— Reuben Rose-Redwood, Time, 23 Oct. 2026
Forest had the bulk of the chances in a gritty second period but could not make its superiority count.

— ABC News, ABC News, 23 Oct. 2026

Definition of superiority

Noun

Five years later the scientist published a hypothesis that went down in history as Kepler’s conjecture.

— Manon Bischoff, Scientific American, 27 Oct. 2026
Their science fair projects – a bird feeder and a device producing the smoothest smoothies – were also crafted with AI assistance after developing their own hypotheses and plans.

— Dalia Faheid, CNN Money, 26 Oct. 2026

Definition of hypothesis

Noun

Cornelius’s pontificate was complicated by a schism, caused by the self-appointment of the Roman priest Novatian as antipope (the second in papal history) and by the dispute over the church’s attitude toward Christian apostates.

— Encyclopedia Britannica, Encyclopedia Britannica, 30 Oct. 2026
Cory credits his family, and especially his mom, for his positive attitude toward life.

— Sandee LaMotte, CNN Money, 30 Oct. 2026

Definition of attitude

Noun

The exhibits that Lincoln chose to organize reflected her belief that art is concerned not just with aesthetics but also with history, culture and politics, her husband said.

— Bob Goldsborough, Chicago Tribune, 28 Oct. 2026
Trump’s support has bolstered Putin’s belief that time is on his side.

— Michael McFaul, Foreign Affairs, 27 Oct. 2026

Definition of belief

Noun

Pollet, the state representative who sponsored the 2018 presumption bill, acknowledged that the law has fallen short of his expectation.

— Lizz Giordano, ProPublica, 22 Oct. 2026
To many, not least the young, both literary culture and the world of bookselling are beginning a great new climb, calling into question many presumptions about the digital century and the market models that sustain it.

— Nathan Heller, New Yorker, 22 Oct. 2026

Definition of presumption

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assuming

assumption

assumptions

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“Assumption.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/assumption. Accessed 1 Nov. 2026.

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Synonyms of assumption

noun

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