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
Ukraine rejects that assertion and Zelenskyy urged Putin last month to hold a one-on-one meeting with him, but the Kremlin leader refused.
—
Reuters,
NBC news,
5 July 2026
Four fisher people from Indonesia’s Pari Island filed a legal complaint in 2023 against the Swiss construction company Holcim, which refutes their assertion that its climate change-causing emissions threaten their homes and livelihoods.
—
ABC News,
3 July 2026
While there’s some scientific support for the idea that finger movements can engage the brain, neurologists say assertions that daily pinky time can ward off dementia on its own are overblown.
—
Stephanie Anderson Witmer,
Health,
3 July 2026
Doing so would amount to an unusual assertion of power from the House minority, which historically has almost no ability to enforce any of its own investigative requests.
—
Nicholas Wu,
semafor.com,
2 July 2026
See All Example Sentences for assertion
Examples are automatically compiled from online sources to
show current usage.
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Reuters,
NBC news,
5 July 2026
Four fisher people from Indonesia’s Pari Island filed a legal complaint in 2023 against the Swiss construction company Holcim, which refutes their assertion that its climate change-causing emissions threaten their homes and livelihoods.
—
ABC News,
3 July 2026
While there’s some scientific support for the idea that finger movements can engage the brain, neurologists say assertions that daily pinky time can ward off dementia on its own are overblown.
—
Stephanie Anderson Witmer,
Health,
3 July 2026
Doing so would amount to an unusual assertion of power from the House minority, which historically has almost no ability to enforce any of its own investigative requests.
—
Nicholas Wu,
semafor.com,
2 July 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 6 Jul. 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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