Invalid Definition
ĭnvə-lĭd
invalids
noun
invalids
A weak, sickly person; esp., one who is chronically ill or disabled.
Webster's New World
adjective
Incapacitated by illness or injury.
American Heritage Medicine
Not well; weak and sickly; infirm.
Webster's New World
Of or for invalids.
An invalid home.
Webster's New World
Not valid; having no force; null or void.
Webster's New World
Falsely based or reasoned; faulty.
An invalid argument.
American Heritage
Synonyms:
verb
invalids
To make invalid; disable or weaken.
Webster's New World
To incapacitate physically.
American Heritage
To remove (a soldier, sailor, etc.) from active duty or from a combat zone because of injury or illness.
Webster's New World
To release or exempt from duty because of ill health.
American Heritage
To incapacitate physically.
American Heritage Medicine
Other Word Forms of Invalid
Noun
Singular:
invalidPlural:
invalidsOrigin of Invalid
-
Latin invalidus weak in- not in–1 validus strong (from valēre to be strong wal- in Indo-European roots)
From American Heritage Dictionary of the English Language, 5th Edition
-
From Middle French invalide, from Latin invalidus (“infirm, weak”), from in- (“not”) + validus (“strong”)
From Wiktionary
From invalid (influenced by French invalide sickly, infirm)
From American Heritage Dictionary of the English Language, 5th Edition
-
in- + valid
From Wiktionary
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