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
Meth sentencing decisions are often based on outdated data and assumptions, not science, according to a growing consensus of professionals who study the drug’s chemistry, effects and abuse patterns.
—
Kevin Krause, Dallas Morning News, 6 Jan. 2026
But according to multiple sources with direct knowledge of the post-raid landscape, that assumption rests on dangerously fragile ground.
—Antonio María Delgado, Miami Herald, 6 Jan. 2026
People incorrectly assumed others in their party held extreme views about wolves, and those assumptions in turn shaped their own attitudes toward the species.
—Justin Angle, The Conversation, 6 Jan. 2026
Some researchers, like Lembke, have questioned whether alcohol is simply being replaced by other substances, which would undercut the assumption that young people are making healthier choices.
—Jason Mastrodonato, Mercury News, 6 Jan. 2026
See All Example Sentences for assumption
Recent Examples of Synonyms for assumption
Noun
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Those are, indeed, pat, credible theories and predictions.—
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But now, in the planet’s capital city of Apperax, a murder is committed with no suspects, forensics or theories.—
Noun
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Miami, Fort Lauderdale and West Palm Beach take turns transforming into floating marketplaces — docks converted to catwalks, hulls polished to reflective arrogance, sales reps who can quote fuel burn like yacht owners care about costs.—
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College football is awash in problems, including the Big Ten’s unrivaled arrogance, and its never-ending list of demands that would make Notre Dame blush.—
Noun
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Ensure your home is securely locked when vacating the premises.—
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The Pretty Woman actress was not particularly enthused by that premise.—
Noun
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Conversely, Taiwan’s adoption of drone technologies and counter-measures reflects a broader global trend in modern warfare where autonomy, numbers, and networked systems can offset traditional military superiority.—
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Despite Barca’s recent dominance and established superiority in terms of history, fanbase and budget, the rivalry between the clubs is fierce.—
Noun
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The story of the Platonic representation hypothesis paper began in early 2023, a turbulent time for AI researchers.—
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Furthermore, Jie said that laboratory simulations support the hypothesis that the majority of the surface regolith inside Shackleton Crater is conducive to the stable preservation of water ice.—
Noun
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For those keen to find pieces that possess similar attitude and individuality, the fall collections have plenty of to offer.—
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That no-nonsense attitude seems to come naturally for Debi Mazar, who has made a name for herself as a character actress going back decades.—
Noun
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The long hours spent fishing were also good for meditating and reinforced his belief in the destiny marked out for him.—
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The latter movie musical, directed and co-written by Mona Fastvold, tells the story of the titular founder of the Shakers, who brought her religious beliefs from England to America in the 18th century.—
Noun
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By making a presumption of guilt and of the state’s inerrancy, the attorney general is repudiating the rule of law, which is grounded in the state’s obligation to prove its case.—
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Social engineering is rife with gender presumptions, said Karl Sigler, senior security manager at Trustwave SpiderLabs.—
Cite this Entry
“Assumption.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/assumption. Accessed 12 Jan. 2026.
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