(a.) Pertaining to or designating the arid division of the Austral zone, including the warmer parts of the western United States and central Mexico. It is divided into the Upper Sonoran, which lies next to the Transition zone, and the Lower Sonoran, next to the Tropical.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). sonoran. Retrieved September 29, 2026, from http://smartdefine.org/sonoran/definitions/2064003 |
| Chicago | Webster's. 2011. "sonoran" http://smartdefine.org/sonoran/definitions/2064003 (accessed September 29, 2026). |
| Harvard | Webster's 2011, sonoran, Smart Define, viewed 29 September, 2026, <http://smartdefine.org/sonoran/definitions/2064003>. |
| MLA | Webster's. "sonoran" 28 May 2011. Web. 29 September 2026. <http://smartdefine.org/sonoran/definitions/2064003> |