AskDefine | Define improper

Dictionary Definition

improper adj
1 not suitable or right or appropriate; "slightly improper to dine alone with a married man"; "improper medication" [ant: proper]
2 not conforming to legality, moral law, or social convention; "an unconventional marriage"; "improper banking practices" [syn: unconventional, unlawful]
3 not appropriate for a purpose or occasion; "unsuitable attire for the office"; "said all the wrong things" [syn: unsuitable, wrong]

User Contributed Dictionary



improprius “not proper,” from in- “in-” + propriusproper.”



  1. unsuitable to needs or circumstances; inappropriate
  2. Not in keeping with conventional mores or good manners; indecent or immodest
  3. Not according to facts; inaccurate or erroneous
  4. Not consistent with established facts; incorrect
  5. Not properly named; See, for example, improper fraction


unsuitable to needs or circumstances
not in keeping with conventional mores or good manners
Not according to facts
Not consistent with established facts
Not properly named


to improper
  1. To appropriate
  2. To behave improperly

Extensive Definition

See also

improper in French: Impropre

Synonyms, Antonyms and Related Words

Doric, aberrant, abnormal, abominable, amiss, arrant, atrocious, bad, barbaric, barbarous, base, black, blamable, blameworthy, blooper, boner, boo-boo, break, cacophonous, careless, chintzy, clumsy, coarse, corrupt, corruption, criminal, crude, damnable, dark, delinquent, deviant, disgraceful, disorderly, disruptive, doggerel, dysphemistic, erroneous, evil, excessive, execrable, false, faulty, faux pas, flagitious, flagrant, foul, fresh, futile, gaffe, gauche, graceless, gross, hardly the thing, harsh, heinous, ignominious, ill, ill-adapted, ill-advised, ill-assorted, ill-chosen, ill-considered, ill-fitted, ill-matched, ill-seasoned, ill-sorted, ill-suited, ill-timed, illegal, immodest, immoral, impertinent, impolite, impolitic, imprecise, impropriety, impure, in bad taste, inaccurate, inadmissibility, inadmissible, inadvisable, inapplicable, inapposite, inappropriate, inapt, inauspicious, incompatible, inconcinnate, inconcinnous, incongruous, inconvenient, incorrect, incorrectness, indecent, indecorous, indecorousness, indecorum, indelicate, indiscreet, inelegance, inelegant, inept, inexact, inexpedient, infamous, infelicitous, inferior, informal, iniquitous, inopportune, intempestive, intrusive, invalid, irregular, irrelevant, knavish, lascivious, late, lewd, loose, low, mal a propos, maladjusted, malapropos, malevolent, malodorous, misbehaving, misjoined, mismatched, mismated, misplaced, mistaken, mistimed, monstrous, naughty, nefarious, not done, not respectable, not the thing, objectionableness, obscene, off base, off color, off-base, off-color, offensive, out of character, out of joint, out of keeping, out of line, out of phase, out of place, out of proportion, out of season, out of time, out of tune, out-of-line, outlandish, peccant, premature, rank, reprehensible, reprobate, risque, rough, rowdy, rowdyish, rude, ruffianly, sacrilegious, sassy, scandalous, shameful, shameless, sinful, sinister, slipshod, slovenly, solecism, solecistic, suggestive, tactless, tasteless, terrible, too late, too soon, unacceptableness, unadapted, unapt, unbecoming, unbecomingness, unbefitting, unbehaving, unbeseeming, uncalled-for, unceremonious, uncomely, unconventional, uncourtly, uncouth, undecorous, undesirable, undignified, undue, uneuphonious, unfavorable, unfelicitous, unfit, unfitted, unfitting, unforgivable, unfortunate, ungenteel, ungodly, ungraceful, ungrammatic, unhandy, unhappy, unhealthy, unkind, unlawful, unlucky, unmeet, unmeetness, unpardonable, unpleasant, unpolished, unprofitable, unpropitious, unqualified, unready, unrefined, unrighteous, unripe, unseasonable, unseemliness, unseemly, unskillful, unspeakable, unsuitable, unsuited, untasteful, untimely, untoward, untrue, unwise, unworthy, vernacularism, vicious, vile, villainous, vulgar, vulgarism, wicked, wrong, wrongful
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