'Southwestern' definitions:

Definition of 'southwestern'

From: WordNet
adjective
Situated in or oriented toward the southwest [syn: southwest, southwestern, southwesterly]
adjective
Of a region of the United States generally including New Mexico; Arizona; Texas; California; and sometimes Nevada; Utah; Colorado
noun
A dialect of Middle English [syn: Southwestern, West Saxon]

Definition of 'Southwestern'

From: GCIDE
  • Southwestern \South`west"ern\, a. Of or pertaining to the southwest; southwesterly; as, to sail a southwestern course. [1913 Webster] Southwestward