• IPA: /saʊθˈwɛst/
• (nautical, dialectal) IPA: /saʊˈwɛst/

southwest (uncountable)

1. The compass point halfway between south and west, specifically 225°, abbreviated as SW.
   • 1908, W[illiam] B[lair] M[orton] Ferguson, chapter IV, in Zollenstein, New York, N.Y.: D. Appleton & Company, OCLC 731476803 ↗, page 40 ↗:

     So this was my future home, I thought! […] Backed by towering hills, the but faintly discernible purple line of the French boundary off to the southwest, a sky of palest Gobelin flecked with fat, fleecy little clouds, it in truth looked a dear little city; the city of one's dreams.

• French: sud-ouest
• German: Südwesten
• Italian: sudovest
• Portuguese: sudoeste
• Russian: ю́го-за́пад
• Spanish: sudoeste, suroeste

southwest (not comparable)

1. Of or pertaining to the southwest; southwestern.
2. Towards the southwest, southwestwards, southwestern.
3. From the southwest, southwesterly

• French: sud-ouest, du sud-ouest
• Portuguese: sudoeste, do sudoeste
• Russian: юго-за́падный
• Spanish: suroeste, del sudoeste