- (n.) One who advocates extreme measures; an ultraist; an extremist; a radical.
- (a.) Going beyond others or beyond due limit; extreme; fanatical; uncompromising; as, an ultra reformer; ultra measures.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). ultra. Retrieved September 28, 2026, from http://smartdefine.org/ultra/definitions/2076075 |
| Chicago | Webster's. 2011. "ultra" http://smartdefine.org/ultra/definitions/2076075 (accessed September 28, 2026). |
| Harvard | Webster's 2011, ultra, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/ultra/definitions/2076075>. |
| MLA | Webster's. "ultra" 28 May 2011. Web. 28 September 2026. <http://smartdefine.org/ultra/definitions/2076075> |