The south side or the southern side of a place or object; the area facing south.
窓は南側にあるので、部屋は日当たりがいい。
The windows face the south, so the room gets a lot of sunlight.
建物の南側に公園が整備されている。
A park has been developed on the south side of the building.
南側の部屋は冬でも暖かいことが多い。
Rooms on the south side are often warm even in winter.