Definition of assertion noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//əˈsɜːʃn//
    ; NAmE NAmE//əˈsɜːrʃn//
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  1. 1[countable] a statement saying that you strongly believe something to be true synonym claim He was correct in his assertion that the minister had been lying. Do you have any evidence to support your assertions? Synonymsclaimallegation assertionThese are all words for a statement that something is true, although it has not been proved.claim a statement that something is true, although it has not been proved.allegation (rather formal) a public statement that is made without giving proof, accusing somebody of doing something that is wrong or illegal.assertion (rather formal) a statement of something that you strongly believe to be true, although it has not been proved.claim or assertion? When the point in doubt is a matter of opinion, not fact, use assertion:She made sweeping claims about the role of women in society. When you are talking about a matter of fact you can use either word; an assertion may be slightly stronger than a claim and it is a more formal word.Patterns a(n) claim/​allegation/​assertion that… a(n) claim/​allegation/​assertion about/​of something false/​unfounded/​conflicting claims/​allegations/​assertions to make/​deny a(n) claim/​allegation/​assertion to withdraw a(n) claim/​allegation
  2. 2[uncountable, countable] the act of stating, using or claiming something strongly the assertion of his authority The demonstration was an assertion of the right to peaceful protest.
  3. Word Originlate Middle English: from Latin assertio(n-), from the verb asserere ‘claim, affirm’, from ad- ‘to’ + serere ‘to join’.Extra examples Researchers have recently challenged these assertions. The argument needs to progress beyond the simple assertion that criminals are made not born. Your assertion is not supported by the facts. assertions about human nature sweeping assertions about the role of women in society
See the Oxford Advanced American Dictionary entry: assertion

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