1. mackenzie(n = noun.person) sir alexander mackenzie - Canadian explorer (born in England) who explored the Mackenzie River and who was first to cross North America by land north of Mexico (1764-1820);
is a kind of adventurer, explorer
2. mackenzie(n = noun.object) mackenzie river - a Canadian river; flows into the Beaufort Sea;
is a kind of river
is a part of canada
a Canadian river; flows into the Beaufort Sea. [WordNet 1.5]