Jul 25, 2026 · 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.

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

2 days ago · Synonyms for INVALID: fragile, weak, weakly, sickly, dying, sick, frail, ailing; Antonyms of INVALID: well, healthy, whole, sound, wholesome, fit, hale, hearty

May 17, 2026 · invalid (plural invalids) (dated, sometimes offensive) Any person with a disability or illness. (dated, sometimes offensive) A person who is confined to home or bed because of illness, …

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

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 …

A person who is very sick or injured and needs frequent care is an invalid. Also, something no longer current or useful is invalid.

6 meanings: 1. a. a person with disablement or chronic ill health b. (as modifier) 2. incapacitated or disabled by injury,.... Click for more definitions.

3 invalid / ˈ ɪnvələd/ Brit / ˈ ɪnvəˌliːd/ verb invalids; invalided; invaliding Britannica Dictionary definition of INVALID [+ object] British : to release (someone) from active military service because of illness or …