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
Murphy made a similar assertion in his Wednesday ruling, also claiming that the Supreme Court not immediately lifting the blocks on ending TPS for Haiti and Syria before justices hear those arguments strengthens his ruling.
—
Jack Birle, The Washington Examiner, 9 Apr. 2026
Know More The Pentagon’s recent assertion of editorial control over Stars and Stripes is part of a broader and well-documented crackdown by the department over any media coverage that could be seen as critical of the department or even simply unsanctioned by its official communications operation.
—Max Tani, semafor.com, 9 Apr. 2026
The group is likely to issue a statement outlining its formal position on the ceasefire and on Netanyahu's assertion that Lebanon is not included, the three Lebanese sources said.
—Beirut Bureau, USA Today, 8 Apr. 2026
The assertion that Scripps was making excessive demands almost gave me a milk-out-of-my-nose moment.
—Sun Sentinel Editorial Board, Sun Sentinel, 7 Apr. 2026
See All Example Sentences for assertion
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Jack Birle, The Washington Examiner, 9 Apr. 2026
Know More The Pentagon’s recent assertion of editorial control over Stars and Stripes is part of a broader and well-documented crackdown by the department over any media coverage that could be seen as critical of the department or even simply unsanctioned by its official communications operation.
—Max Tani, semafor.com, 9 Apr. 2026
The group is likely to issue a statement outlining its formal position on the ceasefire and on Netanyahu's assertion that Lebanon is not included, the three Lebanese sources said.
—Beirut Bureau, USA Today, 8 Apr. 2026
The assertion that Scripps was making excessive demands almost gave me a milk-out-of-my-nose moment.
—Sun Sentinel Editorial Board, Sun Sentinel, 7 Apr. 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 12 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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