INVALID Definition & Meaning - Merriam-Webster
The meaning of INVALID is not valid. How to use invalid in a sentence.
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.
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 incapacitated by a chronic illness or disability. adj. 1. Incapacitated by illness …
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 stopped and the results declared invalid. We cannot accept liability if you …
invalid - Wiktionary, the free dictionary
Sep 22, 2025 · 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 invalid …
invalid adjective - Definition, pictures, pronunciation and ...
Definition of invalid adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
invalid - WordReference.com Dictionary of English
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.