It means the answer is an abbreviation for a direction (e.g. ENE, SSW for east by northeast, south by southwest)
SW
SWA
The correct compass abbreviation for southwest is SW.
South Southwest
The abbreviation for South is simply "S."
When? South and Southwest where?
the land in the south and southwest is warm
The abbreviation for New South Wales is NSW.
Antarctica is south of South America, in both the southeast and southwest directions.
The abbreviation of South in a compass, for example, is simply the letter "S".
SA is the abbreviation for the state of South Australia.