A journey, usually a difficult or dangerous one, made with planning and a clear goal.

A northern water route from the Atlantic to the Pacific.

To go completely around.

Someone sent to do religious or charitable work in a territory or foreign country.

Military operations by which Christian armies reclaimed control of Spain and Portugal during the Middle Ages.

A formal agreement between nations.

A community of living things and their environments.

The movement of peoples, livestock, plants, and technologies between continents resulting from the exploration and colonization of the Americas.

To improve or change the condition of something.

A person who organizes and operates a business.

A conqueror, especially one of the 16th-century Spanish soldiers who defeated the civilizations in the Americas.

The charting of a course for a ship or aircraft.

A narrow waterway joining two larger bodies of water.

Passing a people's cultural history from one generation to the next by storytelling.

Rebellion against authority, especially rebellion of sailors against superior officers.