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1. Dictionary

   In·val·id

   /inˈvaləd/

   

   adjective

   • 1. (of an official document or procedure) not legally recognized and therefore void because contravening a regulation or law: "the will was declared invalid and the children were entitled to the estate" Similar voidlegally voidnullnull and voidunenforceablenot bindinginoperativeworthlessillegitimateincorrectimproperunacceptableinapplicableannullednullifiedcanceledrevokedrescindedabolishedrepealedOpposite 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

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2. 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…

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

   www.dictionary.com › browse › invalid

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   adjective. not valid; not founded in truth, fact, or logic, and hence weak and indefensible; unsound; untenable: The entire argument depends on an invalid assumption. Synonyms: incorrect, inaccurate, false, erroneous, unsubstantiated, unfounded, groundless, baseless. deficient in effectiveness; inadequate:

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

   dictionary.cambridge.org › dictionary › english

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   An invalid document, ticket, law, etc. is not legally or officially acceptable: I'm afraid your driving licence is invalid in Eastern Europe. An invalid opinion, argument, etc. is not correct, usually because it is not logical or not based on correct information: an invalid argument.

5. 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.

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

   www.collinsdictionary.com › dictionary › english

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   An invalid is someone who is very ill or disabled and needs to be cared for by someone else.

7. www.oxfordlearnersdictionaries.com › us › definitioninvalid adjective - Definition, pictures, pronunciation and usage...

   www.oxfordlearnersdictionaries.com › us › definition

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   Definition of invalid adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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

   www.thefreedictionary.com › invalid

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   1. Not legally or factually valid; null: an invalid license. 2. Falsely based or reasoned; faulty: an invalid argument. [Latin invalidus, weak : in-, not; see in-1 + validus, strong (from valēre, to be strong; see wal- in Indo-European roots ).] in′va·lid′i·ty (-və-lĭd′ĭ-tē) n. in·val′id·ly adv.

9. dictionary.cambridge.org › us › dictionaryINVALID | definition in the Cambridge Learner’s Dictionary

   dictionary.cambridge.org › us › dictionary

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   INVALID meaning: 1. someone who is so sick that they have to be looked after by other people 2. An invalid document…. Learn more.

10. www.merriam-webster.com › thesaurus › invalidINVALID Synonyms: 269 Similar and Opposite Words - ...

    www.merriam-webster.com › thesaurus › invalid

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    Synonyms for INVALID: weak, fragile, weakly, dying, sickly, frail, sick, ailing; Antonyms of INVALID: well, healthy, whole, sound, wholesome, fit, hale, hearty.

11. 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.