From King Dictionary of Contemporary English
Related topics: Nationality & race
GreekGreek1 /ɡriːk/ adjective SANrelating to Greece, its people, or its language Greek yoghurt
GreekGreek2 noun 1 [countable]SAN someone from Greece2 [uncountable]SLL the language used in modern or ancient Greece3 [countable] American EnglishSEC a member of a sorority or fraternity at an American college or university4 it’s all Greek to meOrigin Greek2 (800-900) Latin Graecus, from Greek Graikos