Great Slave Lake (), known traditionally as Tıdeè in the Tłı̨chǫ language, Tinde’e in the Yellowknife language, Tu Nedhé in Dëne Sųłıné Yatıé, and Tucho in the Dehcho Dene language, is the second-largest lake in the Northwest Territories of Canada (after Great Bear Lake), the deepest lake in North America at , and the tenth-largest lake in the world. It is long and wide. It covers an area of in the southern part of the territory. Its given volume ranges from to and up to making it the 10th or 12th largest by volume.