Sumerian

[soo-meer-ee-uh n, -mer-] /suˈmɪər i ən, -ˈmɛr-/
adjective
1.
of or pertaining to Sumer, its people, or their language.
noun
2.
a native or inhabitant of Sumer.
3.
a language of unknown affinities that was the language of the Sumerians and had, in the late 4th and 3rd millenniums b.c., a well-developed literature that is preserved in pictographic and cuneiform writing and represents the world's oldest extant written documents.
Origin
1870-75; Sumer + -ian
Related forms
pre-Sumerian, adjective, noun
British Dictionary definitions for Sumerian

Sumerian

/suːˈmɪərɪən; -ˈmɛər-/
noun
1.
a member of a people who established a civilization in Sumer during the 4th millennium bc
2.
the extinct language of this people, of no known relationship to any other language
adjective
3.
of or relating to ancient Sumer, its inhabitants, or their language or civilization
Word Origin and History for Sumerian
adj.

1874, from French Sumérien (1872), from Sumer, name of a district in ancient Babylonia.