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1. Dictionary

   invalidate

   /ɪnˈvalɪdeɪt/

   verb

   • 1. make or prove (an argument, statement, or theory) unsound or erroneous. Similar disproveshow/prove to be falserefuteexplodecontradictrebutnegategainsaybeliegive the lie todiscreditexposedebunkknock the bottom out ofdrive a coach and horses throughweakenunderminecompromiseinformal:shoot full of holesshoot down (in flames)formal:confutenegativeOpposite validatesupport
   • 2. deprive (an official document or procedure) of legal validity because it contravenes a regulation or law: "a technical flaw in her papers invalidated her nomination" Similar render invalidvoidnullifyannulnegatecancelquashvetooverturnoverruleoverrideundoreverserevokerescindabolishrepealrepudiateterminateOpposite validate

   Word Origin mid 17th century: from medieval Latin invalidat- ‘annulled’, from the verb invalidare (based on Latin validus ‘strong’).

   Derivatives

   • 1. invalidation noun
   • 2. invalidator noun

   Scrabble Points: 14

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   More definitions, origin and scrabble points

2. dictionary.cambridge.org › dictionary › englishINVALIDATE | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

   • Cached

   INVALIDATE definition: 1. to officially stop a document, ticket, law, etc. being legally or officially acceptable 2. to…. Learn more.

3. www.merriam-webster.com › dictionary › invalidateInvalidate Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › invalidate

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   The meaning of INVALIDATE is to make invalid; especially : to weaken or destroy the cogency of. How to use invalidate in a sentence. Synonym Discussion of Invalidate.

4. www.dictionary.com › browse › invalidateINVALIDATE Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › invalidate

   • Cached

   Invalidate definition: to render invalid; discredit.. See examples of INVALIDATE used in a sentence.

5. www.vocabulary.com › dictionary › invalidateInvalidate - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › invalidate

   To invalidate means to cancel something or make it void, as if it never happened. In invalidate you see the word valid which means true or correct. When you invalidate something you are making it less true, less official, or less correct.

6. dictionary.cambridge.org › us › dictionaryINVALIDATE | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

   • Cached

   INVALIDATE meaning: 1. to officially stop a document, ticket, law, etc. being legally or officially acceptable 2. to…. Learn more.

7. www.collinsdictionary.com › dictionary › englishINVALIDATE definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

   • Cached

   To invalidate something such as an argument, conclusion, or result means to prove that it is wrong or cause it to be wrong.

8. www.oxfordlearnersdictionaries.com › english › invalidateinvalidate verb - Definition, pictures, pronunciation and usage...

   www.oxfordlearnersdictionaries.com › english › invalidate

   • Cached

   verb. /ɪnˈvælɪdeɪt/ Verb Forms. invalidate something to prove that an idea, a story, an argument, etc. is wrong. This new piece of evidence invalidates his version of events. Flawed research methods may invalidate the study’s conclusions. Topics Opinion and argument c2. Definitions on the go.