invalid
The definition of an invalid is a sick, weak person.
(noun)An example of an invalid is a feeble old woman in a hospital who cannot walk.
Invalid is defined as not correct or provable or not legally recognized.
(adjective)- An example of invalid is a theory that has been proven wrong.
- An example of invalid is a marriage without a proper marriage license.
See invalid in Webster's New World College Dictionary
adjective
- not well; weak and sickly; infirm
- of or for invalids: an invalid home
Origin: Fr invalide < L invalidus, feeble: see in- & valid
noun
transitive verb
- to make invalid; disable or weaken
- Chiefly Brit. to remove (a soldier, sailor, etc.) from active duty or from a combat zone because of injury or illness
adjective
Origin: L invalidus
Related Forms:
- invalidity noun
- invalidly adverb
See invalid in American Heritage Dictionary 4
noun
- Incapacitated by illness or injury.
- Of, relating to, or intended for invalids.
- To incapacitate physically.
- Chiefly British To release or exempt from duty because of ill health: “I was not quite sick enough to be invalided out, even though I was of no more use” (Mary Lee Settle).
Origin:
Origin: From invalid2 (influenced by French invalide, sickly, infirm)
.adjective
- Not legally or factually valid; null: an invalid license.
- Falsely based or reasoned; faulty: an invalid argument.
Origin:
Origin: Latin invalidus, weak
Origin: : in-, not; see in-1
Origin: + validus, strong (from valēre, to be strong; see wal- in Indo-European roots)
.Related Forms:
- inˌva·lidˈi·ty (-və-lĭdˈĭ-tē) noun
- in·valˈid·ly adverb
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