AskDefine | Define invalid

Dictionary Definition

invalid adj
1 having no cogency or legal force; "invalid reasoning"; "an invalid driver's license" [ant: valid]
2 no longer valid; "the license is invalid" n : someone who is incapacitated by a chronic illness or injury [syn: shut-in]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]

User Contributed Dictionary

English

Pronunciation

  • qualifier adjective
    • , /ɪnˈvæl.ɪd/, /In"v

Extensive Definition

Invalid may refer to:
As the opposite of valid:
  • Validity, in logic, true premises cannot lead to a false conclusion
  • Validity (statistics), a measure which is measuring what it is supposed to measure
  • .invalid, a top-level domain not intended for real use
invalid in Kölsch: Invalid (Watt ėßß datt?)
invalid in Russian: Инвалид (значения)

Synonyms, Antonyms and Related Words

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patient, peaked, peaky, peccant, pillar saint, pillarist, reasonless, recluse, reduce, reduced, reduced in health, repealed, repudiated, revoked, rheumatic, run-down, seclusionist, self-annulling, self-contradictory, self-refuting, senseless, shut-in, sick, sick person, sicken,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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