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 the administration's assertion about no longer pursuing the fund failed to convince some who were skeptical, a number of amendments to formally bar such payouts were defeated during a marathon session of votes in the Senate that stretched from Thursday morning into the early hours of Friday.
—
Caitlin Yilek, CBS News, 9 June 2026
Trump continued making those assertions last week as Becerra closed in on Hilton in the governor’s race and as Republican Spencer Pratt started slipping in the Los Angeles mayoral race.
—Linh Tat, Daily News, 9 June 2026
Norcross says the measure would be the most significant new protection for workers since before World War II, an assertion echoed by labor leaders.
—Andrea Hsu, NPR, 9 June 2026
At a Monday news conference in Texas on the USDA’s response, Rollins was asked about Miller’s recent assertion that ranchers would not report a case on their farms over fear that the government would impose a quarantine.
—Garrett Downs, CNBC, 8 June 2026
See All Example Sentences for assertion
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Caitlin Yilek, CBS News, 9 June 2026
Trump continued making those assertions last week as Becerra closed in on Hilton in the governor’s race and as Republican Spencer Pratt started slipping in the Los Angeles mayoral race.
—Linh Tat, Daily News, 9 June 2026
Norcross says the measure would be the most significant new protection for workers since before World War II, an assertion echoed by labor leaders.
—Andrea Hsu, NPR, 9 June 2026
At a Monday news conference in Texas on the USDA’s response, Rollins was asked about Miller’s recent assertion that ranchers would not report a case on their farms over fear that the government would impose a quarantine.
—Garrett Downs, CNBC, 8 June 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 10 Jun. 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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