| Term | Definition |
| Henry the Navigator | A man who improved sailing by building an observatory and navigation school; paid people to sail on voyages of exploration |
| Vasco da Gama | An explorer who discovered the first sea route to Asia |
| Christopher Columbus | A sailor from Genoa, Italy, who attempted to reach Asia by sailing west across the Atlantic Ocean |
| Ferdinand Magellan | An explorer who was the leader of the first voyage to circumnavigate, or go all the way around the globe |
| Sir Francis Drake | An English sailor who sailed to the Americas to steal gold and silver |
| Spanish Armada | A large fleet of Spanish ships that was defeated by England in 1588 |
| circumnavigate | to go all the way around (hint: the circumference is the distance around a circle) |