A Latin preposition, denoting beyond, outside of; -- often used in composition as a prefix signifying outside of, beyond, besides or in addition to what is denoted by the word to which it is prefixed.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). extra-. Retrieved September 25, 2026, from http://smartdefine.org/extra-/definitions/2006415 |
| Chicago | Webster's. 2011. "extra-" http://smartdefine.org/extra-/definitions/2006415 (accessed September 25, 2026). |
| Harvard | Webster's 2011, extra-, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/extra-/definitions/2006415>. |
| MLA | Webster's. "extra-" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/extra-/definitions/2006415> |