Definition of "Rhaetian"

A native or inhabitant of Rhaetia in central and eastern Switzerland.  examples

Pertaining to the culture or geography of Raetia.  examples

(linguistics) An extinct non-Romance language spoken in the ancient region of Raetia in the eastern Alps in pre-Roman and Roman times.  examples

Rhaeto-Romance, a continuum of modern Romance languages spoken in much the same region.  examples