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 Also, something no longer current or useful is invalid.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

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 …

May 17, 2026 · Adjective invalid (comparative more invalid, superlative most invalid) Not valid; not true, correct, acceptable, or …

He was returned, but the election was declared invalid. A fall from his horse in 1845 made him a hopeless invalid, and completely …

1 invalid /ɪn ˈ væləd/ adjective Britannica Dictionary definition of INVALID : not valid: such as a : having no force or effect

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 Also, something no longer current or useful is invalid.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

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

Not valid; of no force, weight, or cogency; weak. In law, having no validity or binding force; wanting efficacy; null; void: as, an invalid …