(historical) a member of an ancient Indo-European ethnic group of Dacia. / (obsolete) a Dane, Denmark having been known as Dacia in Medieval Latin. / (rare, poetic) a Romanian.

An extinct Indo-European language spoken by the people of Dacia.

Of or pertaining to Dacia or the Dacians. / (rare, poetic) Of or pertaining to Romania or Romanians. / (obsolete) Of or pertaining to Denmark or the Danes.

plural of Dacian

(Indo-European studies) a proposed branch within the Indo-European language family formed by the Dacian and Thracian languages.