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

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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 Each commitment carries an implicit assumption about what that individual will deliver in the years ahead. — Julian Hayes Ii, Forbes.com, 15 Aug. 2026 These countries’ economic viability rests on the assumption of a standing Chinese bid. — Michael B. G. Froman, Foreign Affairs, 13 Aug. 2026 Such measures rely on the carceral assumption that harsher punishments will deter violence, despite strong evidence to the contrary. — Literary Hub, 13 Aug. 2026 Under this assumption, capex being on chips today likely results in years of cash generation beyond what many had thought possible — and what the buyers of those chips thought necessary to justify the purchases. — CNBC, 12 Aug. 2026 See All Example Sentences for assumption

Recent Examples of Synonyms for assumption

Noun

Quanta spoke with Cao about evidence for the programmed theory of aging, what happens at each stage, and why aging mammals are like trees shedding leaves.

— Ingrid Wickelgren, Quanta Magazine, 14 Aug. 2026
The sheriff's office also sought to rebut theories that had circulated publicly about the case, including claims that evidence was missing or the crime scene had been manipulated.

— Zachary Bynum, CBS News, 14 Aug. 2026

Definition of theory

Noun

State lawmakers are considering a bill that would require large retailers to preserve documentation of immigration enforcement activity on their premises, following ICE raids at Home Depot parking lots in Southern California last summer.

— Sacbee.com, Sacbee.com, 15 Aug. 2026
These two solitary characters who don’t have a lot of people around them, that’s not a very dramatic premise.

— Beatrice Verhoeven, HollywoodReporter, 15 Aug. 2026

Definition of premise

Noun

The superiority of the German Jews turned out to be nothing but a mirage.

— Literary Hub, Literary Hub, 12 Aug. 2026
Khrushchev’s victory ensured the superiority of party leaders relative to other figures in the state, cementing his own power and giving him control of the regime.

— Julian G. Waller, Foreign Affairs, 7 Aug. 2026

Definition of superiority

Noun

British astronomer Arthur Eddington knew that, under Einstein’s hypothesis, the sun should bend the light of other stars.

— Adam Kovac, Scientific American, 11 Aug. 2026
Eusebius of Caesarea, who attended the First Council of Nicaea, described the meeting as taking place in a small church — a detail that Şahin said supports his hypothesis.

— Andrea Margolis, FOXNews.com, 10 Aug. 2026

Definition of hypothesis

Noun

White, Clark and others with the Fever have been asked to respond to Cunningham’s beliefs since, and other voices in the league have weighed in as well.

— Brian Hamilton, New York Times, 12 Aug. 2026
States without personal-belief exemptions consistently have higher vaccination rates – and are less likely to see outbreaks of vaccine-preventable diseases – than states that do allow them.

— Brenda Goodman, CNN Money, 11 Aug. 2026

Definition of belief

Noun

Mungiu refuses to supply easy answers or simple paths to identification in this compelling provocation, which poses unresolvable questions to viewers about our biases and presumptions.

— Jill Goldsmith, Deadline, 11 Aug. 2026
The defense motion filed Friday acknowledges there is a presumption against bond in extradition proceedings but argues that release can be granted in special circumstances.

— David Fischer, Los Angeles Times, 11 Aug. 2026

Definition of presumption

Browse Nearby Words

assuming

assumption

assumptions

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Style

“Assumption.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/assumption. Accessed 19 Aug. 2026.

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Synonyms of assumption

noun

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