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

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

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 Also, something no longer current or useful is invalid.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 main uses of this word have to do with people and things that don't …

May 17, 2026 · Adjective invalid (comparative more invalid, superlative most invalid) Not valid; not true, correct, acceptable, or appropriate. Synonyms: disallowed, nonvalid Antonym: valid Your argument is …

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

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.

Learn the 3 key meanings of 'invalid' (adj.): not legally valid, logically flawed, and a chronically ill person. See clear examples, avoid common mistakes, and understand the difference between 'invalid' and …

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

5 days ago · The simple definition of INVALID is not valid: such as.