Antiochian Greek Christians are an ethnoreligious Eastern Christian group native to the Levant. They are either members of the Greek Orthodox Church of Antioch or the Melkite Greek Catholic Church, and they have ancient roots in what is now Syria, Lebanon, Palestine, Jordan, the southern Turkish province of Hatay, which includes the city of Antakya —one of the holiest cities in Eastern Christianity, and Israel. Many of their descendants now live in the global Near Eastern Christian diaspora. They primarily speak Levantine Arabic, with Maaloula near Damascus being one of the few places where a Western Aramaic dialect is still spoken.

Rūm, also romanized as Roum, is a derivative of Parthian (frwm) terms, ultimately derived from Greek Ῥωμαῖοι. Both terms are endonyms of the pre-Islamic inhabitants of Anatolia, the Middle East and the Balkans and date to when those regions were parts of the Eastern Roman Empire.