What is the meaning of the word "na-dene"?

Definitions:

  1. A group of Native American languages that are thought to be related and may have descended from a single protolanguage. copy to clipboard NOUN
    • Most linguists specializing in Native American Languages, do not discern large, clear-cut groupings other than Eskimo-Aleut and Na-Dene. copy to clipboard

Synonyms: