define first nations
First Nations. First Nation is a term used to describe Aboriginal peoples of Canada who are ethnically neither M tis nor Inuit. This term came into common usage in the 1970s and 80s and generally replaced the term Indian, although unlike Indian, the term First Nation does not have a legal definition.irst Nation is a term used to describe Aboriginal peoples of Canada who are ethnically neither M tis nor Inuit. This term came into common usage in the 1970s and 80s and generally replaced the term Indian, although unlike Indian, the term First Nation does not have a legal definition.