noun

1. a person born or living in ancient or modern Greece
2. the language of the Greeks, constituting a separate branch of the Indo-European language family
3. ancient Greek, esp. that of the classical period (c. 8th-4th cent. )
4. ☆ Informal a member of a Greek-letter fraternity or sorority

Etymology: ME Greke < OE Grec < L Graecus < Gr Graikos, name orig. used by Illyrians for the Dorians in Epirus (< Grāi, Grāii < Grāes, native name of the people of Epirus); later applied by the people of Italy to all Hellenes

adjective

1. of ancient or modern Greece or its people, language, or culture
2. designating or of Greek Catholics or the Greek Orthodox Church

Etymology: ME Grec < the n. & < Fr grec < L Graecus