• (a.) Capable of being sailed round.
Cir`cum·nav'i·ga·ble adjective Capable of being sailed round. Ray. 
circumnavigable 1. The ability to sail or to fly around. 2. Capable of making the circuit of by navigation: 'The earth is circumnavigable if one has the right aircraft.' 3. The possibility of going or maneuvering around: 'They had to find a circumnavigable way to get through the heavy downtown traffic.'