'Koine' definitions:

Definition of 'Koine'

(from WordNet)
noun
A Greek dialect that flourished under the Roman Empire
noun
A common language used by speakers of different languages; "Koine is a dialect of ancient Greek that was the lingua franca of the empire of Alexander the Great and was widely spoken throughout the eastern Mediterranean area in Roman times" [syn: lingua franca, interlanguage, koine]