assertion
Americannoun
-
a positive statement or declaration, often without support or reason.
a mere assertion;
an unwarranted assertion.
- Synonyms:
- allegation, contention, claim
-
an act of asserting.
noun
-
a positive statement, usually made without an attempt at furnishing evidence
-
the act of asserting
Other Word Forms
Etymology
Origin of assertion
1375–1425; late Middle English assercion < Latin assertiōn- (stem of assertiō ). See assert, -ion
Explanation
An assertion is a declaration that's made emphatically, especially as part of an argument or as if it's to be understood as a statement of fact. To assert is to state with force. So if someone makes an assertion, they’re not just trying out an idea — they really mean it. An assertion can also be an act that seems to make a statement without words. When your dog urinates in multiple places up and down your block, he's making an assertion of his dominance (also called "marking") over his "territory."
Vocabulary lists containing assertion
The New SAT: Words to Capture Tone
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The SAT: Words to Capture Tone, List 6
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"The Story of an Hour" by Kate Chopin
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It is a potent, and lasting, assertion of self.
From Los Angeles Times • May 13, 2026
She has been accused of bearing false witness with her assertion that one of the wealthiest religious organizations in the world is savvy enough to literally invest in influencers.
From Salon • May 10, 2026
He said "it probably wasn't locked" and added that the assertion that the department didn't have a clue "isn't right".
From BBC • May 8, 2026
While the possibility remains that hostilities could flare up again in the Persian Gulf, Haefele is adamant that gradual de-escalation is ongoing, citing President President Trump’s assertion that a cease fire is still in effect.
From MarketWatch • May 8, 2026
This had to do with Bunderson’s assertion that Rindlisbacher failed to and was required to read Reggie his Miranda rights.
From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
