Entry 2 senses · 2 variants Webster, 1913 Southwest /(?; colloq. sou"-.)/ · South·west · IPA /saʊθˈwɛst/ n. a. 01 n. The point of the compass equally from the south and the west; the southwest part or region. 1. The point of the compass equally from the south and the west; the southwest part or region. 02 a. Pertaining to, or in the direction of, the southwest; proceeding toward the southwest; coming from the southwest; as, a southwest wind. 1. Pertaining to, or in the direction of, the southwest; proceeding toward the southwest; coming from the southwest; as, a southwest wind.