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Synonyms

assertion

American  
[uh-sur-shuhn] / əˈsɜr ʃən /

noun

  1. a positive statement or declaration, often without support or reason.

    a mere assertion;

    an unwarranted assertion.

    Synonyms:
    allegation, contention, claim
  2. an act of asserting.


assertion British  
/ əˈsɜːʃən /

noun

  1. a positive statement, usually made without an attempt at furnishing evidence

  2. the act of asserting

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • assertional adjective
  • misassertion noun
  • nonassertion noun
  • overassertion noun
  • reassertion noun
  • superassertion noun

Etymology

Origin of assertion

1375–1425; late Middle English assercion < Latin assertiōn- (stem of assertiō ). See assert, -ion

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.

The stock’s decline also dovetails with a U.S. government appeal of a federal court ruling in September of 2024 that rejected tougher remedies to the assertion that it holds a monopoly in online search.

From Barron's • Mar. 25, 2026

Trump’s assertion that the talks were productive was met with pushback from Iranian officials, who denied that the discussions were taking place.

From The Wall Street Journal • Mar. 24, 2026

You might roll your eyes at the quasi-hippie assertion, but 100 pages later, you will nod your head sagely in agreement.

From Salon • Mar. 24, 2026

But she did not read that assertion aloud.

From BBC • Mar. 18, 2026

He was so certain of the truth of his assertion that he had become obstinate, as people do in violent arguments.

From "The Once and Future King" by T. H. White