assertion

noun

as·​ser·​tion ə-ˈsər-shən How to pronounce assertion (audio)
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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This is because, despite assertions to the contrary, research, such as Dr Sandra Portocarrero’s work on undocumented entrepreneurs in California, has shown that immigrants contribute positively to the economy. London School Of Economics, Forbes.com, 24 June 2025 Those are assertions that will be reexamined as the impact of Saturday’s U.S. bombings becomes clearer. ‘MAKE IRAN GREAT AGAIN’: Trump, who previously denied wanting to topple Iran’s regime, on Sunday seemed to encourage that idea. Alexis Simendinger, The Hill, 23 June 2025 Despite Haliburton’s assertion, Indiana was written off as dead. Shakeia Taylor, New York Times, 20 June 2025 In the biggest and broadest protests of his second term, millions of Americans in about 2,000 communities across the country gathered Saturday to object to his assertion of unprecedented presidential powers that opponents say violate the Constitution. Nicole Fallert, USA Today, 17 June 2025 See All Example Sentences for assertion

Word History

Etymology

see assert

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of assertion was in the 15th century

Browse Nearby Words

Cite this Entry

“Assertion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/assertion. Accessed 30 Jun. 2025.

Kids Definition

assertion

noun
as·​ser·​tion ə-ˈsər-shən How to pronounce assertion (audio)
a-
: the act of asserting
also : something asserted : declaration

More from Merriam-Webster on assertion

Last Updated: - Updated example sentences
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