(1):

(a.) Not peculiar or appropriate to individuals; general; common.

(2):

(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.

(3):

(v. t.) To appropriate; to limit.

(4):

(a.) Not according to facts; inaccurate; erroneous.