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

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 Also, something no longer current or useful is invalid.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

The simple definition of INVALID is not valid: such as.

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 …

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 …

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

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

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

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 Also, something no longer current or useful is invalid.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