assertion
noun
as·ser·tion
ə-ˈsər-shən 
a-
: the act of asserting or something that is asserted: such as
a
: insistent and positive affirming, maintaining, or defending (as of a right or attribute)
an assertion of ownership/innocence
b
: a declaration that something is the case
He presented no evidence to support his assertions.
Examples of assertion in a Sentence
the assertion that all men have certain unalienable rights is set forth in the Declaration of Independence
made the unlikely assertion that gravity affects light
Recent Examples on the Web
Trump undermined the argument of his prepared remarks by riffing on the economy with a series of unconvincing, hyperbolic assertions and false statements.
—
David Goldman, CNN Money, 11 Dec. 2025
Trump's recent assertions dismissing inflation are not backed by official government economic data.
—Joe Hernandez, NPR, 11 Dec. 2025
The Cambodian Defense Ministry said the Thai assertion that the Cambodian side had stated the fighting was false and its forces were not responding to Thai attacks.
—Robert Birsel, MSNBC Newsweek, 8 Dec. 2025
The solicitor general’s assertion was met with some pushback by justices who questioned how far-reaching that claim would be and whether the agencies are solely exerting executive power.
—Jack Birle, The Washington Examiner, 8 Dec. 2025
See All Example Sentences for assertion
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David Goldman, CNN Money, 11 Dec. 2025
Trump's recent assertions dismissing inflation are not backed by official government economic data.
—Joe Hernandez, NPR, 11 Dec. 2025
The Cambodian Defense Ministry said the Thai assertion that the Cambodian side had stated the fighting was false and its forces were not responding to Thai attacks.
—Robert Birsel, MSNBC Newsweek, 8 Dec. 2025
The solicitor general’s assertion was met with some pushback by justices who questioned how far-reaching that claim would be and whether the agencies are solely exerting executive power.
—Jack Birle, The Washington Examiner, 8 Dec. 2025
See All Example Sentences for assertion
Cite this Entry
“Assertion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/assertion. Accessed 22 Dec. 2025.
Copy CitationKids Definition
assertion
noun
as·ser·tion
ə-ˈsər-shən
a-
: the act of asserting
also
: something asserted : declaration
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