Great Slave Lake Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a large lake in Canada located in the Northwest Territories. Example Sentence Great Slave Lake is the deepest lake in North America. More Example Sentences Many people enjoy fishing at this lake. Synonyms lake; water body; geographic feature Hear It! Say It! Write It! Great Slave Lake Switch to cursive Start Share with your friends: