1
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
2
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
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Recent Examples of assumption
Some evolutionary algorithms keep only the best performers in the population, on the assumption that progress moves endlessly forward.
—
IEEE Spectrum, 26 June 2025
Many took to social media to express their disappointment, criticizing the invitation for falling flat — expectations that have been largely set by assumptions of a billionaire’s wedding budget.
—Leah Dolan, CNN Money, 25 June 2025
And while this study certainly doesn't say dinosaurs never ran – there's a general consensus that some did – the researchers hope their analysis will encourage debate and perhaps a revision of previous assumptions that may be way off, both in speed and behavior.
—New Atlas, 24 June 2025
Minimalist running shoes are born from the assumption that the best, most natural running is done barefoot.
—Jonathan Beverly, Outside Online, 23 June 2025
See All Example Sentences for assumption
IEEE Spectrum, 26 June 2025
Many took to social media to express their disappointment, criticizing the invitation for falling flat — expectations that have been largely set by assumptions of a billionaire’s wedding budget.
—Leah Dolan, CNN Money, 25 June 2025
And while this study certainly doesn't say dinosaurs never ran – there's a general consensus that some did – the researchers hope their analysis will encourage debate and perhaps a revision of previous assumptions that may be way off, both in speed and behavior.
—New Atlas, 24 June 2025
Minimalist running shoes are born from the assumption that the best, most natural running is done barefoot.
—Jonathan Beverly, Outside Online, 23 June 2025
See All Example Sentences for assumption
Recent Examples of Synonyms for assumption
Noun
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The Distributed Responsibility Challenge These divergent approaches reflect different theories of technological governance.—
Cornelia C. Walther,
Forbes.com,
16 June 2025
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By cultivating a multitude of such microbial habitats, the researchers can compare them and develop theories of how ecological communities work.—
Gabriel Popkin,
Quanta Magazine,
16 June 2025
Noun
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The lines between competitive stubbornness and plain old stubbornness, a healthy arrogance and prideful ignorance are pretty thin.—
Will Graves,
The Orlando Sentinel,
6 June 2025
-
Individuals with big egos display excessive pride in their abilities and accomplishments, often leading to arrogance and overconfidence.—
AllBusiness,
Forbes.com,
3 June 2025
Noun
-
Ensure your home is securely locked when vacating the premises.—
CA Weather Bot,
Sacbee.com,
25 June 2025
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Those were the only two with a similar kind of premise.—
Brian Davids,
HollywoodReporter,
23 June 2025
Noun
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Beijing’s military capabilities already surpass India’s, and given its lower defense burden—the ratio of military expenditures to GDP—China could expand its defense spending with fewer penalties to its economic growth compared with India while further widening its military superiority.—
ASHLEY J. TELLIS,
Foreign Affairs,
17 June 2025
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Dad, as fathers do, asserted his physical superiority.—
Marcus Thompson II,
New York Times,
17 June 2025
Noun
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But 63% of respondents rated call spoofing among their top five challenges in outbound voice and the second most common hypothesis as to why existing customers are not answering calls.—
James Garvert,
Forbes.com,
20 June 2025
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Oddly enough, a different kind of neutrino, called a tau neutrino, is one hypothesis that some scientists have put forth as the cause of the anomalous signals.—
Ashley Strickland,
CNN Money,
20 June 2025
Noun
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Almost like a Draymond — not Draymond’s attitude, but the mentality.—
David Aldridge,
New York Times,
19 June 2025
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Both Jeff Bezos and Andy Jassy have echoed that attitude and authenticity—not just skills—are what set successful candidates apart.—
Sasha Rogelberg,
Fortune,
18 June 2025
Noun
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Rowling has courted controversy since 2020 for regularly sharing beliefs on social media that many believe are transphobic.—
Zack Sharf,
Variety,
22 June 2025
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Whether or not influencers should share political beliefs online has been a contentious debate for years, but amid President Donald Trump’s second administration, crackdowns on health care, college protesters, and immigrants, this discourse has been pushed to the forefront.—
CT Jones,
Rolling Stone,
21 June 2025
Noun
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Its presumptions about free speech match those of our time, but not those of their own.—
Fara Dabhoiwala,
Harpers Magazine,
4 June 2025
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The presumption in this case is that the firm is delivering a message its clients want to see permeate.—
Erik Sherman,
Forbes.com,
4 June 2025
Cite this Entry
“Assumption.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/assumption. Accessed 30 Jun. 2025.
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