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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.

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

The editorial cites an assertion by American Enterprise Institute senior fellow Roger Pielke Jr. that parts of the chapter were ghost written by our colleague Michael Burger.

From The Wall Street Journal • Mar. 20, 2026

There’s a lot of data that backs this assertion up.

From Barron's • Mar. 11, 2026

Noem claimed in the hearing that Trump had signed off on the campaign, an assertion that reportedly infuriated Trump.

From Slate • Mar. 5, 2026

The quietly inoffensive assertion of a black child’s attempt to communicate with a white adult.

From "The Bluest Eye" by Toni Morrison