Dictionary.com
Thesaurus.com
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

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."

Keep Reading on Vocabulary.com

Vocabulary lists containing assertion

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.

Assertion of independence was possible, and Tacitus’ works present a number of voices of senatorial independence.

From Salon • Dec. 11, 2019

After he gave a meandering soliloquy in response to a question about banks, Rubio took it upon himself to implement a Troubled Assertion Relief Program, exclaiming, “He’s right on point, there.”

From The New Yorker • Nov. 30, 2015

The feminist debate at the literary festival culminated in the session titled "Imagine: Resistance, Protest, Assertion."

From New York Times • Feb. 1, 2013

Facts is survived by two brothers, Rumor and Innuendo, and a sister, Emphatic Assertion.

From Chicago Tribune • Apr. 20, 2012

In 1521 therefore he entered the lists against Luther with an "Assertion of the Seven Sacraments" for which he was rewarded by Leo with the title of "Defender of the Faith."

From History of the English People, Volume III The Parliament, 1399-1461; The Monarchy 1461-1540 by Green, John Richard

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "assertion" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com