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⇱ invalidate | meaning of invalidate in Longman Dictionary of Contemporary English | LDOCE

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English

invalidate

Word family (noun) validity ≠ invalidity (adjective) valid ≠ invalid (verb) validate ≠ invalidate
From Longman Dictionary of Contemporary Englishinvalidatein‧val‧i‧date /ɪnˈvælədeɪt/ ●○○ AWL verb [transitive] 1 USE somethingto make a document, ticket, claim etc no longer legally or officially acceptable Failure to disclose all relevant changes may invalidate your policy.2 WRONG/INCORRECTto show that something such as a belief or explanation is wrong Later findings invalidated the theory.→ See Verb tableExamples from the Corpusinvalidate• If we look closely at Professor Thomson's argument, we see that his conclusion is invalidated by a number of factual errors.• None of the more recent views invalidates Hahnemann's original discoveries or teachings.• The elements of Christianity that come from older beliefs do not necessarily invalidate the religion.• The Educational Testing Service invalidated the scores of 18 students.From Longman Business Dictionaryinvalidatein‧val‧i‧date /ɪnˈvælədeɪt/ verb [transitive] LAW to make a contract, agreement, document etc invalidFailure to follow the instructions correctly could invalidate the guarantee.The Judge’s ruling invalidated the company’s patent. —invalidation noun [uncountable]The Court of Appeals refused to reconsider its previous invalidation of the contract.→ See Verb table
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Word of the day interfere to deliberately get involved in a situation where you are not wanted or needed
Verb table
invalidate
Simple Form
Present
I, you, we, theyinvalidate
he, she, itinvalidates
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Past
I, you, he, she, it, we, theyinvalidated
Present perfect
I, you, we, theyhave invalidated
he, she, ithas invalidated
Past perfect
I, you, he, she, it, we, theyhad invalidated
Future
I, you, he, she, it, we, theywill invalidate
Future perfect
I, you, he, she, it, we, theywill have invalidated
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Continuous Form
Present
Iam invalidating
he, she, itis invalidating
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you, we, theyare invalidating
Past
I, he, she, itwas invalidating
you, we, theywere invalidating
Present perfect
I, you, we, theyhave been invalidating
he, she, ithas been invalidating
Past perfect
I, you, he, she, it, we, theyhad been invalidating
Future
I, you, he, she, it, we, theywill be invalidating
Future perfect
I, you, he, she, it, we, theywill have been invalidating
> View Less