Available Definitions:
1) a. - 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.
2) a. - Not peculiar or appropriate to individuals; general; common.
3) a. - Not according to facts; inaccurate; erroneous.
4) v. t. - To appropriate; to limit.