the Greek language commonly spoken and written in eastern Mediterranean countries in the Hellenistic and Roman periods
a type of dialect (a regional variety of a language) [n KOINES]
amalgam of Greek dialects, chiefly Attic and Ionic, that replaced the Classical Greek dialects in the Hellenistic period and flourished under the Roman Empire
lingua franca
dialect or language of a region that has become the common or standard language of a larger area
a type of dialect (a language peculiar to a region) [n -S]