Pisidia Syllabification: (Pi·sid·i·a)Pronunciation: /pəˈsidēə, pī-/Definition of Pisidia an ancient region in Asia Minor, between Pamphylia and Phrygia. It was incorporated into the Roman province of Galatia in 25 bc. Derivatives Pisidian adjective & noun Pisidia in other Oxford dictionaries Definition of Pisidia in the British & World English dictionary