There are five meanings listed in OED's entry for the noun assertion, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence. 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. ASSERTION definition: a positive statement or declaration, often without support or reason. See examples of assertion used in a sentence.

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assertion (əˈsɜːʃən) n 1. a positive statement, usually made without an attempt at furnishing evidence 2. the act of asserting The meaning of ASSERTION is the act of asserting or something that is asserted. How to use assertion in a sentence. as•ser•tion (ə sûr′ shən), n. a positive statement or declaration, often without support or reason: a mere assertion; an unwarranted assertion. an act of asserting. Definition of assertion noun from the Oxford Advanced Learner's Dictionary. [countable] a statement saying that you strongly believe something to be true synonym claim. He was correct in his assertion. Nov 25, 2025 · By surface analysis, assert +‎ -ion. assertion (countable and uncountable, plural assertions) The act of asserting; positive declaration or averment. You're a man of strong assertions!

Nov 25, 2025 · By surface analysis, assert +‎ -ion. assertion (countable and uncountable, plural assertions) The act of asserting; positive declaration or averment. You're a man of strong assertions!

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