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
Chinese Foreign Ministry spokesman Guo Jiakun was questioned on Haley’s assertion during a Tuesday press conference. —
Mike Brest, The Washington Examiner, 21 Apr. 2026 But the attack may have dealt a blow to the Mexican government’s assertions that the country is a safe place to visit, coming months after widespread attacks by criminal groups in response to a drug lord’s killing. —Michael Rios, CNN Money, 21 Apr. 2026 Much about the project, however, remains tied up in legal challenges, including the future of a federal consent decree supposed to outline any pipeline restart and an assertion from California that the company is now trespassing through Gaviota State Park. —Grace Toohey, Los Angeles Times, 20 Apr. 2026 Applegate’s rep last week declined to confirm or deny sources’ assertion to TMZ that the actress had been hospitalized since late March. —Jami Ganz, New York Daily News, 20 Apr. 2026 See All Example Sentences for assertion
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.
Mike Brest, The Washington Examiner, 21 Apr. 2026 But the attack may have dealt a blow to the Mexican government’s assertions that the country is a safe place to visit, coming months after widespread attacks by criminal groups in response to a drug lord’s killing. —Michael Rios, CNN Money, 21 Apr. 2026 Much about the project, however, remains tied up in legal challenges, including the future of a federal consent decree supposed to outline any pipeline restart and an assertion from California that the company is now trespassing through Gaviota State Park. —Grace Toohey, Los Angeles Times, 20 Apr. 2026 Applegate’s rep last week declined to confirm or deny sources’ assertion to TMZ that the actress had been hospitalized since late March. —Jami Ganz, New York Daily News, 20 Apr. 2026 See All Example Sentences for assertion
Cite this Entry
“Assertion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.grautoblog.com/dictionary/assertion. Accessed 25 Apr. 2026.
Copy CitationKids Definition
assertion
noun
as·ser·tion ə-ˈsər-shən
a-
: the act of asserting
also : something asserted : declaration
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