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 Reducing uncertainty can help to some extent, but local authorities also need to build mitigation strategies under the assumption that a fire is coming. — Aleeza Gerstein, The Conversation, 28 Aug. 2026 The assumption must be approved by the lender and the buyer must past income and credit requirements. — Sharon Wu, USA Today, 27 Aug. 2026 Still, the idea that people are willing and able to report their actual opinions is a core assumption for public opinion polls to work. — Scott Clement, Washington Post, 27 Aug. 2026 The traditional assumption was that many of them would leave after graduation, often for New York. — Daniel Cassady, ARTnews.com, 27 Aug. 2026 See All Example Sentences for assumption

Recent Examples of Synonyms for assumption

Noun

The lipstick index is an economic theory holding that sales of affordable discretionary spending or luxuries skyrocket when consumers believe an economic recession is impending.

— Sarah Glodek, Fortune, 28 Aug. 2026
Yet Turing’s theory of computation wasn’t really about computers, at least not at first.

— Ben Brubaker, Quanta Magazine, 28 Aug. 2026

Definition of theory

Noun

Sustained gunfire began past midnight at the premises of the Diori Hamani International Airport, which hosts a major military base, according to an AP witness who requested anonymity for safety reasons.

— ABC News, ABC News, 29 Aug. 2026
There was nothing particularly novel about the show’s premise, but the scripts were refreshingly dense with jokes, prioritizing laughs over contrived drama or seasonlong relationship arcs.

— Ben Rosenstock, Vulture, 28 Aug. 2026

Definition of premise

Noun

One side is struggling to turn military superiority into lasting political gains, while the other may need only to survive to claim victory.

— Zachary Schermele, USA Today, 27 Aug. 2026
The protagonist is legendary swordsman Miyamoto Musashi, depicted as a young samurai who arrives in Kyoto determined to prove his superiority with the blade.

— Brian Mazique, Forbes.com, 22 Aug. 2026

Definition of superiority

Noun

Until then, readers should take these issues as interesting hypotheses and case discussions.

— Steve Denning, Forbes.com, 31 Aug. 2026
Data from the Forest Service tentatively confirms Finch’s hypothesis, suggesting that kudzu occupies around 227,000 acres of Southern land, just a small fraction of the millions of acres it has been said to cover.

— The Editors, JSTOR Daily, 26 Aug. 2026

Definition of hypothesis

Noun

Before Gus could take on that role, Bell first had to find a dog with the right attitude for the job.

— Lauren Paige Richeson, USA Today, 28 Aug. 2026
In a sport like golf, where grinders like Clark are revered, that sort of head-down, do-the-work attitude may be what ends up appealing to fans.

— Kyle Feldscher, CNN Money, 27 Aug. 2026

Definition of attitude

Noun

Just as a market will theoretically arrive at the optimal price for a good that reflects the interests of many agents, trading in predictions could distill research, observation, and belief into actionable odds.

— Finn Brunton, Harpers Magazine, 1 Sep. 2026
It's rooted in our belief that, regardless of where Corning shares are coming from, regaining upside momentum will be extremely difficult in the near-term.

— Zev Fima, CNBC, 1 Sep. 2026

Definition of belief

Noun

The fact that plaintiffs can gerrymander market definitions to trigger PNB’s structural presumption is exactly the kind of abuse that has led scholars to argue PNB should be overturned.

— Shubha Ghosh, Fortune, 31 Aug. 2026
These were all reasonable presumptions at that time but would also require years of data to evaluate.

— David N. Hackney, STAT, 26 Aug. 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 4 Sep. 2026.

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Synonyms of assumption

noun

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