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invalid1

[in-vuh-lid; British in-vuh-leed] /ˈɪn və lɪd; British ˈɪn vəˌlid/
noun
1.
an infirm or sickly person.
2.
a person who is too sick or weak to care for himself or herself:
My father was an invalid the last ten years of his life.
3.
Archaic. a member of the armed forces disabled for active service.
adjective
4.
unable to care for oneself due to infirmity or disability:
his invalid sister.
5.
of or for invalids:
invalid diets.
6.
(of things) in poor or weakened condition:
the invalid state of his rocking chair.
verb (used with object)
7.
to affect with disease; make an invalid:
He was invalided for life.
8.
to remove from or classify as not able to perform active service, as an invalid.
9.
British. to remove or evacuate (military personnel) from an active theater of operations because of injury or illness.
verb (used without object), Archaic.
10.
to become an invalid.
Origin
1635-1645
1635-45; < French invalide < Latin invalidus weak. See in-3, valid
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for invalidded

invalid1

/ˈɪnvəˌliːd; -lɪd/
noun
1.
  1. a person suffering from disablement or chronic ill health
  2. (as modifier) an invalid chair
adjective
2.
suffering from or disabled by injury, sickness, etc
verb (transitive)
3.
to cause to become an invalid; disable
4.
(usually foll by out; often passive) (mainly Brit) to require (a member of the armed forces) to retire from active service through wounds or illness
Derived Forms
invalidity, noun
Usage note
It is best to avoid using the term invalid when referring to people with chronic illnesses or disabilities
Word Origin
C17: from Latin invalidus infirm, from in-1 + validus strong

invalid2

/ɪnˈvælɪd/
adjective
1.
not valid; having no cogency or legal force
2.
(logic) (of an argument) having a conclusion that does not follow from the premises: it may be false when the premises are all true; not valid
Derived Forms
invalidity (ˌɪnvəˈlɪdɪtɪ), invalidness, noun
invalidly, adverb
Word Origin
C16: from Medieval Latin invalidus without legal force; see invalid1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for invalidded

invalid

adj.

"not strong, infirm," 1640s, from Latin invalidus "not strong, infirm, weak, feeble," from in- "not" (see in- (1)) + validus "strong" (see valid). Specific meaning "infirm from sickness, disease, or injury" is from 1640s.

"of no legal force," 1630s, from special use of Latin invalidus (see invalid (adj.1)).

n.

1709, originally of disabled military men, from invalid (adj.1). Invalides is short for French Hôtel des Invalides, home for old and disabled soldiers in the 7th arrondissement of Paris.

Online Etymology Dictionary, © 2010 Douglas Harper
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invalidded in Medicine

invalid in·va·lid1 (ĭn'və-lĭd)
n.
One who is incapacitated by a chronic illness or disability. adj.
Incapacitated by illness or injury.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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