RhymeZone: rhaetian definitions

Definitions of Rhaetian:

noun: A native or inhabitant of Rhaetia in central and eastern Switzerland.
adjective: Pertaining to the culture or geography of Raetia.
noun: (linguistics) An extinct non-Romance language spoken in the ancient region of Raetia in the eastern Alps in pre-Roman and Roman times.
noun: Rhaeto-Romance, a continuum of modern Romance languages spoken in much the same region.

(Definitions from Wiktionary)