- (a.) Of or pertaining to the South Downs, a range of pasture hills south of the Thames, in England.
- (n.) A Southdown sheep.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Southdown. Retrieved September 27, 2026, from http://smartdefine.org/southdown/definitions/2064266 |
| Chicago | Webster's. 2011. "Southdown" http://smartdefine.org/southdown/definitions/2064266 (accessed September 27, 2026). |
| Harvard | Webster's 2011, Southdown, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/southdown/definitions/2064266>. |
| MLA | Webster's. "Southdown" 28 May 2011. Web. 27 September 2026. <http://smartdefine.org/southdown/definitions/2064266> |