01 a. Not proper; not suitable; not fitted to the circumstances, design, or end; unfit; not becoming; incongruous; inappropriate; indecent; as, a…
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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.
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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.
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3.
Not according to facts; inaccurate; erroneous.