improper

improper is an Adverb

Definition:

[1] 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. Follow`d his enemy king, and did him service, Improper for a slave. Shak. And to their proper operation still, Ascribe all Good; to their improper, Ill. Pope.

[2] Not peculiar or appropriate to individuals; general; common. [Obs.] Not to be adorned with any art but such improper ones as nature is said to bestow, as singing and poetry. J. Fletcher.

[3] Not according to facts; inaccurate; erroneous. Improper diphthong. See under Diphthong. -- Improper feud, an originalfeud, not earned by military service. Mozley & W. -- Improper fraction. See under Fraction.