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1. Dictionary

   invalid

   /ɪnˈvalɪd/

   adjective

   • 1. (of an official document or procedure) not legally recognized because it contravenes a regulation or law: "the will was declared invalid and the children were entitled to the estate" Similar voidlegally voidnullnull and voidunenforceablenot bindinginoperativeworthlessillegitimateincorrectimproperunacceptableinapplicableannullednullifiedcancelledrevokedrescindedabolishedrepealedOpposite validbinding
   • ▪ (especially of an argument, statement, or theory) not true because based on erroneous information or unsound reasoning: "a comparison is invalid if we are not comparing like with like" Similar falseuntrueinaccuratefaultyfallaciousspuriousinadequateunconvincingunsoundweakwrongwrongly inferredwide of the markoff targetunjustifiedunsubstantiatedunwarranteduntenablebaselessill-foundedunfoundedgroundlessillogicalirrationalunscientificabsurdpreposterousinconsistentinformal:off beamoutway outfull of holesbogusOpposite trueaccurate
   • ▪ (of computer instructions, data, etc.) not conforming to the correct format or specifications.

   Word Origin mid 16th century (earlier than valid): from Latin invalidus, from in- ‘not’ + validus ‘strong’ (see valid).

   Derivatives

   • 1. invalidly adverb

   Scrabble Points: 11

   • I

     1

   • N

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   • V

     4

   • A

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   • L

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   • I

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   • D

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   More definitions, origin and scrabble points

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

   dictionary.cambridge.org › dictionary › english

   • Cached

   Invalid means not legally or officially acceptable, not correct, or not based on correct information. It can also mean a person who is sick and unable to take care of himself or herself.

   • English (US)

     INVALID meaning: 1. An invalid document, ticket, law, etc....

   • Znaczenie Invalid, Definicja W Cambridge English Dictionary

     INVALID definicja: 1. An invalid document, ticket, law, etc....

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

   www.merriam-webster.com › dictionary › invalid

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   The meaning of INVALID is not valid. How to use invalid in a sentence. not valid:; being without foundation or force in fact, truth, or law; logically inconsequent…

4. Videos

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     0:25

     youtube.com

     Invalid | Meaning of invalid

     14 Dec 2020

     16.7K views

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     1:12

     youtube.com

     Invalid | Definition of invalid

     8 Apr 2019

     36.6K views

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     collinsdictionary.com

     INVALID definition and meaning | Collins English Dictionary

     24 Dec 2011

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5. www.dictionary.com › browse › invalidINVALID Definition & Meaning - Dictionary.com

   www.dictionary.com › browse › invalid

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   Invalid can mean a person who is too sick or weak to take care of themselves, or something that is not valid, sound, or legal. Learn the different meanings, synonyms, and usage of invalid with Dictionary.com.

6. www.vocabulary.com › dictionary › invalidInvalid - Definition, Meaning & Synonyms - Vocabulary.com

   www.vocabulary.com › dictionary › invalid

   A person who is very sick or injured and needs frequent care is an invalid. Also, something no longer current or useful is invalid. The main uses of this word have to do with people and things that don't work very well anymore. A driver's license that has expired is invalid — it needs to be renewed. If you lost your health insurance, it's ...

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

   www.collinsdictionary.com › dictionary › english

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   Learn the meaning, pronunciation, and usage of the word 'invalid' in British and American English. Find synonyms, antonyms, examples, and related words for 'invalid'.

8. www.thefreedictionary.com › invalidInvalid - definition of invalid by The Free Dictionary

   www.thefreedictionary.com › invalid

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   Learn the meaning and usage of the word invalid as a noun, adjective, and verb. Find out the difference between invalid and invalide, and see examples and translations in various contexts.

9. dictionary.cambridge.org › learner-english › invalidINVALID | definition in the Cambridge Learner’s Dictionary

   dictionary.cambridge.org › learner-english › invalid

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   Learn the meaning of invalid as a noun and an adjective, with synonyms and translations. Find out how to use invalid to describe someone who is very ill, or something that is not legally or logically acceptable or correct.