I. ˈgrēk noun
Etymology: Middle English Greke, from Old English Grēca, from Latin Graecus, from Greek Graikos
Date: before 12th century
1.
a. : a native or inhabitant of ancient or modern Greece
b. : a person of Greek descent
2.
a. : the language used by the Greeks from prehistoric times to the present constituting a branch of Indo-European — see Indo-European languages table
b. : ancient Greek as used from the time of the earliest records to the end of the second century A.D. — see Indo-European languages table
c. often not capitalized
[translation of Latin Graecum (in the medieval phrase Graecum est; non potest legi It is Greek; it cannot be read)]
: something unintelligible
it's Greek to me
3. : a member of a Greek-letter fraternity or sorority
II. adjective
Date: 14th century
1. : of, relating to, or characteristic of Greece, the Greeks, or Greek
Greek architecture
2.
a. : Eastern Orthodox
b. : of or relating to an Eastern church using the Byzantine rite in Greek
c. : of or relating to the established Orthodox church of Greece
3. : of or relating to fraternities or sororities
the Greek system