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
Walz rejected the assertion that Minnesota is a sanctuary state.
—
Frederick Melo, Twin Cities, 30 Sep. 2025
This assertion that Mary was a child of a well-to-do family might have some historical validity since this text was composed at a time when the poverty and celibacy of the Holy Family had become associated with her nunlike virtue.
—Literary Hub, 30 Sep. 2025
Kenvue, Tylenol’s manufacturer, objected to the assertion, but studies worldwide have landed on both sides of a possible connection.
—Robert Abitbol, USA Today, 27 Sep. 2025
The assertion was made by retired FBI task force investigator Ken Mains, who is attempting to solve cold cases that may be linked to the 91-year-old.
—Stephanie Nolasco, FOXNews.com, 27 Sep. 2025
See All Example Sentences for assertion
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Frederick Melo, Twin Cities, 30 Sep. 2025
This assertion that Mary was a child of a well-to-do family might have some historical validity since this text was composed at a time when the poverty and celibacy of the Holy Family had become associated with her nunlike virtue.
—Literary Hub, 30 Sep. 2025
Kenvue, Tylenol’s manufacturer, objected to the assertion, but studies worldwide have landed on both sides of a possible connection.
—Robert Abitbol, USA Today, 27 Sep. 2025
The assertion was made by retired FBI task force investigator Ken Mains, who is attempting to solve cold cases that may be linked to the 91-year-old.
—Stephanie Nolasco, FOXNews.com, 27 Sep. 2025
See All Example Sentences for assertion
Cite this Entry
“Assertion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/assertion. Accessed 6 Oct. 2025.
Copy CitationKids Definition
assertion
noun
as·ser·tion
ə-ˈsər-shən
a-
: the act of asserting
also
: something asserted : declaration
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