koine

Noun
  1. A Greek dialect that flourished under the Roman Empire (synset 106989988)
    is a type of: greek, hellenic, hellenic language - the Hellenic branch of the Indo-European family of languages
  2. A common language used by speakers of different languages (synset 106918892)
    "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"
    is a type of: language, linguistic communication - a systematic means of communicating by the use of sounds or conventional symbols
    same as: interlanguage, lingua franca

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