From The Collaborative International Dictionary of English v.0.44 [gcide]:
Invalid \In"va*lid\ (?; 277), noun [F. invalide, noun & a., L. invalidus, adjective See {Invalid} null.] A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health who is unable to care for himself.
From The Collaborative International Dictionary of English v.0.44 [gcide]:
Invalid \In"va*lid\, adjective [See {Invalid}, noun] Not well; feeble; infirm; sickly; as, he had an invalid daughter.
From The Collaborative International Dictionary of English v.0.44 [gcide]:
Invalid \In"va*lid\, verb (used with an object)
1. To make or render invalid or infirm. ''Invalided, bent, and almost blind.'' --Dickens.
2. To classify or enroll as an invalid.
Peace coming, he was invalided on half pay. --Carlyle.
From The Collaborative International Dictionary of English v.0.44 [gcide]:
Invalid \In*val"id\, adjective [Pref. in- not + valid: cf. F. invalide, L. invalidus infirm, weak. Cf. {Invalid} infirm.]
1. Of no force, weight, or cogency; not valid; weak.
2. (Law) Having no force, effect, or efficacy; void; null; as, an invalid contract or agreement.
From WordNet (r) 2.0 [wn]:
adjective
1: having no cogency or legal force; "invalid reasoning"; "an invalid driver's license" [ant: {valid}]
2: no longer valid; "the license is invalid"
noun
1: someone who is incapacitated by a chronic illness or injury [syn: {shut-in}]
verb
1: force to retire, remove from active duty, as of firemen
2: injure permanently; "He was disabled in a car accident" [syn: {disable}, {incapacitate}, {handicap}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
194 Moby Thesaurus words for "invalid": Diogenes, Hieronymian, Hieronymite, Timon of Athens, absonant, afflict, ailing, anchoress, anchorite, annulled, apoplectic, arthritic, ascetic, bad, barren, bedridden invalid, black, blank cartridge, bootless, cachectic, case, castrato, cloistered monk, closet cynic, consumptive, contradictory, contrary to reason, counterproductive, criminal, cripple, debilitate, debilitated, derange, desert fathers, desert saints, devitalize, disable, disabled, disorder, drained, dud, dyspeptic, effete, empty, enervate, enervated, enfeeble, epileptic, eremite, erroneous, etiolated, eunuch, evil, exhausted, failing, fallacious, false, fatuitous, fatuous, faulty, feckless, feeble, flawed, frail, fruitless, futile, gelding, healthless, hermit, hermitess, homebody, hospitalize, ill, illogical, impaired, imperfect, impotent, improper, in poor health, inaccurate, inadequate, inane, inauspicious, inauthentic, incapacitate, incompetent, inconclusive, incongruous, inconsequent, inconsequential, inconsistent, incorrect, incurable, indispose, ineffective, ineffectual, inefficacious, inexpedient, inferior, infirm, inoperative, inpatient, irrational, isolationist, languishing, lay up, loner, loose, mad, malevolent, marabout, moribund, nonrational, nonscientific, not following, nugacious, nugatory, null and void, of no force, outcast, outpatient, pale, paralogical, pariah, patient, peaked, peaky, peccant, pillar saint, pillarist, reasonless, recluse, reduce, reduced, reduced in health, repealed, repudiated, revoked, rheumatic, run-down, seclusionist, self-annulling, self-contradictory, self-refuting, senseless, shut-in, sick, sick person, sicken, sickly, sinful, sinister, solitaire, solitary, solitudinarian, sophistic, spastic, spurious, stay-at-home, sterile, stylite, sufferer, terminal case, the sick, unauthentic, unavailing, unconnected, unfavorable, unhealthy, unkind, unphilosophical, unpleasant, unreasonable, unscientific, unskillful, unsound, untenable, untoward, untrue, useless, vain, valetudinarian, valetudinary, vicious, victim, void, weaken, weakened, weakling, weakly, wicked, with low resistance, without reason, wrong
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