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Definition of Invalid


  1. Of no force, weight, or cogency; not valid; weak.
  2. Having no force, effect, or efficacy; void; null; as, an invalid contract or agreement.
  3. A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health.
  4. Not well; feeble; infirm; sickly; as, he had an invalid daughter.
  5. To make or render invalid or infirm.
  6. To classify or enroll as an invalid.

Invalid Quotations

Every invalid is a prisoner.
Marguerite Yourcenar

I fell and broke my pelvic bone in three places. So, I'm still sort of an invalid now.
Billy Graham

I think fiction isn't so good at being for or against things in general - the rhetorical argument a short story can make is only actualized by the accretion of particular details, and the specificity of these details renders whatever conclusions the story reaches invalid for wider application.
George Saunders

The worst thing you can do to a kid is tell them that their dreams are invalid.
Juliette Lewis

The establishment in Britain is certainly against the arts and against education. If something doesn't make a profit, it's invalid, and art doesn't make a profit in that sense.
Peter Maxwell Davies
More "Invalid" Quotations

Invalid Translations

invalid in Italian is nullo
invalid in Latin is inritus irritus
invalid in Swedish is ogiltig
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