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
Though historically unfounded, this assertion electrified European esoteric circles.
—
Literary Hub, 26 Feb. 2026
Texas won’t run into another front line like Florida’s over these next few weeks, possibly giving credence to Golden's assertion that the Horns could make some noise come tournament time.
—Cedric Golden, Austin American Statesman, 26 Feb. 2026
To challenge an insurer’s assertion in New York or many other states that material is a trade secret, requesters must make a public records filing for the material through their department of insurance.
—Ron Hurtibise, Sun Sentinel, 26 Feb. 2026
No arrest record available The university pushed back on the union’s assertion that protesters were not warned ahead of the arrests.
—William Melhado, Sacbee.com, 26 Feb. 2026
See All Example Sentences for assertion
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Literary Hub, 26 Feb. 2026
Texas won’t run into another front line like Florida’s over these next few weeks, possibly giving credence to Golden's assertion that the Horns could make some noise come tournament time.
—Cedric Golden, Austin American Statesman, 26 Feb. 2026
To challenge an insurer’s assertion in New York or many other states that material is a trade secret, requesters must make a public records filing for the material through their department of insurance.
—Ron Hurtibise, Sun Sentinel, 26 Feb. 2026
No arrest record available The university pushed back on the union’s assertion that protesters were not warned ahead of the arrests.
—William Melhado, Sacbee.com, 26 Feb. 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 3 Mar. 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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