Improper can mean several things, primarily unsuitable or ill used.

Things and behaviour are generally deemed improper within the context of your society, if you are a cultural relativist or by some universal law of good and evil if you are an absolutist.

Im*prop"er (?), a. [F. impropre, L. improprius; pref. im- not + proprius proper. See Proper.]


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.


Not peculiar or appropriate to individuals; general; common.


Not to be adorned with any art but such improper ones as nature is said to bestow, as singing and poetry. J. Fletcher.


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.


© Webster 1913.

Im*prop"er, v. t.

To appropriate; to limit.


He would in like manner improper and inclose the sunbeams to comfort the rich and not the poor. Jewel.


© Webster 1913.

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