Definitions of Mackenzie:

• noun:   a Canadian river; flows into the Beaufort Sea
• noun:   Canadian explorer (born in England) who explored the Mackenzie River and who was first to cross North American by land north of Mexico (1764-1820)
• name:  A female given name (rare: 1 in 25000 females; popularity rank in the U.S.: #1658)
• name:  A surname (common: 1 in 20000 families; popularity rank in the U.S.: #2574)