- (adv./a.) Offhand; without previous study; extemporaneous; extempore; as, an impromptu verse.
- (n.) Something made or done offhand, at the moment or without previous study; an extemporaneous composition, address or remark.
- (n.) A piece composed or played at first thought; a composition in the style of an extempore piece.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). impromptu. Retrieved September 20, 2026, from http://smartdefine.org/impromptu/definitions/2019847 |
| Chicago | Webster's. 2011. "impromptu" http://smartdefine.org/impromptu/definitions/2019847 (accessed September 20, 2026). |
| Harvard | Webster's 2011, impromptu, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/impromptu/definitions/2019847>. |
| MLA | Webster's. "impromptu" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/impromptu/definitions/2019847> |