(adv.) In a frightful manner; to a frightful dagree.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). frightfully. Retrieved September 21, 2026, from http://smartdefine.org/frightfully/definitions/2010251 |
| Chicago | Webster's. 2011. "frightfully" http://smartdefine.org/frightfully/definitions/2010251 (accessed September 21, 2026). |
| Harvard | Webster's 2011, frightfully, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/frightfully/definitions/2010251>. |
| MLA | Webster's. "frightfully" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/frightfully/definitions/2010251> |