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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

     1

   • V

     4

   • A

     1

   • L

     1

   • I

     1

   • D

     2

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

   dictionary.cambridge.org › dictionary › english

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   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....

   • Portuguese Translation

     invalid translate: nulo, inválido, inválido, -a,...

   • Vietnamese Translation

     INVALID translate: vô hiệu, người tàn tật, cho phục viên vì...

   • Invading

     INVADING definition: 1. present participle of invade 2. to...

   • Patient

     PATIENT definition: 1. a person who is receiving medical...

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

   www.merriam-webster.com › dictionary › invalid

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   Learn the various meanings and uses of the word invalid, as an adjective, noun, or verb. Find synonyms, examples, etymology, and related words for invalid.

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

   www.dictionary.com › browse › invalid

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   noun. an infirm or sickly person. a person who is too sick or weak to take care of their own needs: My father was an invalid the last ten years of his life. Archaic. a member of the armed forces disabled for active service. adjective. unable to care for oneself due to infirmity or disability: his invalid sister. of or for invalids: invalid diets.

5. dictionary.cambridge.org › us › dictionaryINVALID | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

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   INVALID meaning: 1. An invalid document, ticket, law, etc. is not legally or officially acceptable: 2. An invalid…. Learn more.

6. 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'.

7. 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 ...

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.