Relating to Delphi, a town of ancient Greece, on Mount Parnassus in Phocis, or to the sanctuary of Apollo at that place, the most celebrated fane of Greek worship.Of or pertaining to Apollo (as Apollo Delphinius, of Delphi), or to his priestess (the Pythoness) of the oracle of Delphi, who under inspiration delivered the responses of the oracle; hence, inspired.Also Delphinian.n. An inhabitant of Delphi.n. With the definite article, Apollo.