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
Nevertheless, a motion that the city deny the project passed 5-0 based on the assertion that the carport actually would be more like a garage and that its square footage should be included in the overall calculation.
—
Ashley MacKin Solomon, San Diego Union-Tribune, 14 Jan. 2026
Zentner also took issue with Fitzpatrick’s assertion that Bowman should have ensured Troconis had a Spanish-speaking interpreter when speaking with investigators.
—Justin Muszynski, Hartford Courant, 13 Jan. 2026
Particularly at risk were congressional assertions of its own interpretation of the Fourteenth Amendment and efforts to enforce that vision in civil-rights laws, as well as regulations of interstate commerce.
—Duncan Hosie, The Atlantic, 13 Jan. 2026
The Orland Professional Firefighters Local 2754 union continues to raise concerns about the fire district’s ability to respond to an increasing number of calls since an ambulance went offline in June, despite the new fire chief’s assertions the additional ambulance is not needed.
—Olivia Stevens, Chicago Tribune, 13 Jan. 2026
See All Example Sentences for assertion
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Ashley MacKin Solomon, San Diego Union-Tribune, 14 Jan. 2026
Zentner also took issue with Fitzpatrick’s assertion that Bowman should have ensured Troconis had a Spanish-speaking interpreter when speaking with investigators.
—Justin Muszynski, Hartford Courant, 13 Jan. 2026
Particularly at risk were congressional assertions of its own interpretation of the Fourteenth Amendment and efforts to enforce that vision in civil-rights laws, as well as regulations of interstate commerce.
—Duncan Hosie, The Atlantic, 13 Jan. 2026
The Orland Professional Firefighters Local 2754 union continues to raise concerns about the fire district’s ability to respond to an increasing number of calls since an ambulance went offline in June, despite the new fire chief’s assertions the additional ambulance is not needed.
—Olivia Stevens, Chicago Tribune, 13 Jan. 2026
See All Example Sentences for assertion
Cite this Entry
“Assertion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/assertion. Accessed 17 Jan. 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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