invalid

I

(New American Roget's College Thesaurus)

I

adj. void, null, worthless, useless, valueless, unusable. See nullification.

II

n. sufferer, patient, case, shut-in; cripple. —adj. sickly, ill, unhealthy, unwell, weak. See disease.

II

(Roget's IV) modif.

Syn. fallacious, unreasonable, indefensible, null and void; see illogical , void 1 , wrong 2 .

n.

Syn. disabled person, handicapped person, sickly person, patient, convalescent, valetudinarian, paralytic, cripple, weakling, sufferer, shut-in, incurable, consumptive, tubercular, neurasthenic, bedridden person, bed case*; see also patient .

III

(Roget's 3 Superthesaurus)

I

n.

sick person, convalescent, cripple, shut-in, patient.

II

a.

1. null and void unenforceable, impotent, nonviable, inoperative, useless, worthless, not binding.

2. false unfounded, wrong, untrue, fallacious, baseless, unsubstantiated, unproven.

3. sickly weak, feeble, bedridden, disabled, crippled, infirm, frail.

ANT.: 1. valid, viable, binding. 2. true, substantiated, correct. 3. strong, able-bodied

IV

(Roget's Thesaurus II) adjective Containing fundamental errors in reasoning: fallacious, false, illogical, sophistic, specious, spurious, unsound. See CORRECT, TRUE.