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
The latest assertions of Iranian authority over the Strait of Hormuz were announced in a brief statement by Ebrahim Zolfaghari, a spokesperson for Iran’s military and the Islamic Revolutionary Guard Corps.
—
Jeremy Hsu, ArsTechnica, 19 May 2026
The same report notes that Hilton publicly disputes Becerra’s assertion of front-runner status by citing polls indicating a tight race, underscoring that the campaigns are aggressively contesting the narrative rather than drifting in ambiguity.
—Los Angeles Times, 17 May 2026
The government's most powerful leaders focused on the centrality of the nation's Christian roots from its founding − an assertion of some dispute and debate − and the need to rededicate the nation to those values.
—Susan Page, USA Today, 17 May 2026
In keeping with the NFL’s familiar (if fundamentally inaccurate) assertion that 87% of its games are available via free TV, Schroeder and his colleagues resurfaced the figure more than once during Friday’s call.
—Anthony Crupi, Sportico.com, 15 May 2026
See All Example Sentences for assertion
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Jeremy Hsu, ArsTechnica, 19 May 2026
The same report notes that Hilton publicly disputes Becerra’s assertion of front-runner status by citing polls indicating a tight race, underscoring that the campaigns are aggressively contesting the narrative rather than drifting in ambiguity.
—Los Angeles Times, 17 May 2026
The government's most powerful leaders focused on the centrality of the nation's Christian roots from its founding − an assertion of some dispute and debate − and the need to rededicate the nation to those values.
—Susan Page, USA Today, 17 May 2026
In keeping with the NFL’s familiar (if fundamentally inaccurate) assertion that 87% of its games are available via free TV, Schroeder and his colleagues resurfaced the figure more than once during Friday’s call.
—Anthony Crupi, Sportico.com, 15 May 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 21 May. 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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