Adriatic /ˌeɪ.dɹiˈæt.ɪk/adjective 1noun 1 adjective1 •Of or pertaining to the Adriatic Sea.She moves me not, or not removes, at least, Affection's edge in me, were she as rough As are the swelling Adriatic seas: — 1590 noun1 •A sea between Italy and the Balkan Peninsula; an extension of the Mediterranean located between the boot of Italy and the Dalmatian coast of the Balkans; in full, Adriatic Sea.Her husband sail'd upon the Adriatic, And made some voyages, too, in other seas, — 1818