magdalena
- n a river that rises in the Andes mountains in southwestern Colombia and flows generally northward to empty into the Caribbean Sea at Barranquilla
magdalena river
- n a river that rises in the Andes mountains in southwestern Colombia and flows generally northward to empty into the Caribbean Sea at Barranquilla
magellan
- n Portuguese navigator in the service of Spain; he commanded an expedition that was the first to circumnavigate the world (1480-1521)
magellanic cloud
- n either of two small galaxies orbiting the Milky Way; visible near the south celestial pole