Biaxial is a world where there are two gods that are known to all. There is Bala the god of balance and Axial the god of chaos. Those who worship Bala feel the world is always trying to seek balance to even things out. Those who worship Axial feel that the world flows from one event to the next and thy need to adapt through their prayers.
The world, as they currently know it, is evenly distributed with landforms and climates seeking opposites to balance each other. No one has ever sailed out of the sea and returned.
After that, take a look at your wiki. There is some more helpful info there.