Defective1. (a.) Wanting in something; incomplete; lacking a part; deficient; imperfect; faulty; -- applied either to natural or moral qualities; as, a defective limb; defective timber; a defective copy or account; a defective character; defective rules.
2. (a.) Lacking some of the usual forms of declension or conjugation; as, a defective noun or verb.
Thesaurus Entries
aberrant, abroad, adrift, adulterated, all abroad, all off, all wrong, ament, amiss, amputee, arrested, askew, astray, at fault, awry, backward, beside the mark, blemished, born fool, broken, callow, checked, cicatrized, clot, congenital idiot, corrupt, corrupted, cracked, crazed, cretin, cripple, damaged, debased, deceptive, defaced, deficient, deformed, deformity, delusive, deranged, deviant, deviational, deviative, disfigured, disordered, distorted, disturbed, embryonic, errant, erring, erroneous, exceptional, failing, fallacious, fallible, FALSE, faultful, faulty, flawed, found wanting, golem, half-assed, half-wit, handicapped person, heretical, heterodox, hypoplastic, idiot, illogical, illusory, imbecile, immature, impaired, imperfect, imprecise, impure, in arrear, in arrears, in default, in short supply, inaccurate, inadequate, incapable, incompetent, incomplete, inexact, infant, injured, insufficient, juggins, keloidal, kinked, lacking, makeshift, marred, mediocre, mentally deficient, missing, mixed, mongoloid idiot, moron, natural, natural idiot, natural-born fool, needing, not enough, not perfect, not right, not true, off, off the track, on the blink, on the fritz, out, out of order, paralytic, paraplegic, part, partial, patchy, peccant, perverse, perverted, pimpled, pimply, quadriplegic, retarded, scabbed, scabby, scant, scanty, scarified, scarred, scrappy, self-contradictory, short, shy, sick, simp, simple, simpleton, sketchy, split, straying, subnormal, the crippled, the handicapped, too little, twisted, underdeveloped, undeveloped, unequal to, uneven, unfactual, unfinished, unhealthy, unorthodox, unperfected, unproved, unqualified, unsatisfactory, unsatisfying, unsettled, unsound, unsufficing, unthorough, untrue, vitiated, wanting, warped, wide, wrong