- (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.
- (v.t.) To appropriate; to limit.
- (a.) Not according to facts; inaccurate; erroneous.
- (a.) Not peculiar or appropriate to individuals; general; common.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). improper. Retrieved September 21, 2026, from http://smartdefine.org/improper/definitions/2019848 |
| Chicago | Webster's. 2011. "improper" http://smartdefine.org/improper/definitions/2019848 (accessed September 21, 2026). |
| Harvard | Webster's 2011, improper, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/improper/definitions/2019848>. |
| MLA | Webster's. "improper" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/improper/definitions/2019848> |