not suitable or right or appropriate; "slightly improper to dine alone with a married man"; "improper medication" not conforming to legality, moral law, or social convention; "an unconventional marriage"; "improper banking practices
not conforming to legality, moral law, or social convention; "an unconventional marriage"; "improper banking practices
Not proper; not suitable; not fitted to the circumstances, design, or end; unfit; not becoming; incongruous; inappropriate; indecent; as, an improper medicine; improper thought, behavior, language, dress
Improper activities are illegal or dishonest. 25 officers were investigated following allegations of improper conduct during the murder inquiry + improperly im·prop·er·ly I acted neither fraudulently nor improperly
disapproval If you describe someone's behaviour as improper, you mean that it is rude or shocking. He would never be improper, he is always the perfect gentleman. = indecent
Improper conditions or methods of treatment are not suitable or good enough for a particular purpose. The improper use of medicine could lead to severe adverse reactions. = inappropriate + improperly im·prop·er·ly The study confirmed many reports that doctors were improperly trained