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  1. INVALID Definition & Meaning - Merriam-Webster

    3 days ago · The meaning of INVALID is not valid. How to use invalid in a sentence.

  2. invalid - Wiktionary, the free dictionary

    May 17, 2026 · Adjective invalid (comparative more invalid, superlative most invalid) Not valid; not true, correct, acceptable, or …

  3. INVALID Definition & Meaning | Dictionary.com

    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 Also, something no longer current or useful is invalid.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 …

  4. INVALID | English meaning - Cambridge Dictionary

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

  5. INVALID definition and meaning | Collins English Dictionary

    If an action, procedure, or document is invalid, it cannot be accepted, because it breaks the law or some official rule. The trial was …

  6. INVALID Synonyms & Antonyms - 81 words | Thesaurus.com

    Find 81 different ways to say INVALID, along with antonyms, related words, and example sentences at Thesaurus.com.

  7. Invalid - Definition, Meaning & Synonyms | Vocabulary.com

    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 Also, something no longer current or useful is invalid.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 …

  8. Invalid vs invalid - GRAMMARIST

    Invalid and invalid are spelled identically but are pronounced differently and have different meanings, which makes them …

  9. Invalid - definition of invalid by The Free Dictionary

    Define invalid. invalid synonyms, invalid pronunciation, invalid translation, English dictionary definition of invalid. n. One who is …

  10. invalid Definition & Meaning - Dictionary.net

    The comprehensive definition of invalid. Includes pronunciation, synonyms, etymology, and usage examples to help you master this …