The meaning of INVALID is not valid. How to use invalid in a sentence.

Define invalid. invalid synonyms, invalid pronunciation, invalid translation, English dictionary definition of invalid. n. One who is incapacitated by a chronic illness or disability. adj. 1. Incapacitated by illness …

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

If an action, procedure, or document is invalid, it cannot be accepted, because it breaks the law or some official rule. The trial was stopped and the results declared invalid. We cannot accept liability if you …

4 days ago · Adjective invalid (comparative more invalid, superlative most invalid) Not valid; not true, correct, acceptable or appropriate. Your argument is invalid because it uses circular reasoning. This …

a person who is too sick or weak to care for himself or herself: My father was an invalid the last ten years of his life. [Archaic.]a member of the armed forces disabled for active service.

1. Not legally or factually valid; null: an invalid license. 2. Falsely based or reasoned; faulty: an invalid argument.

INVALID definition: an infirm or sickly person. See examples of invalid used in a sentence.

invalid definition: not legally or logically acceptable. Check meanings, examples, usage tips, pronunciation, domains, and related words. Discover expressions like "invalid carriage".

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