Assyrian /əˈsiɹi.ɪn/noun 4adjective 3forms 1 noun4 •(historical) A person who resided in the ancient region on the Upper Tigris river, with capital city of Assur. •(historical) A citizen of an ancient nation and empire, including the northern half of Mesopotamia, with capital city of Nineveh. •A person from a traditional Christian ethnic group with roots in the Middle East, who claim ancestry tracing back to the ancient Assyrians. •A butterfly of the genus Terinos. adjective3 •Of or pertaining to the Assyrian people. •(historical) Of or pertaining to the ancient region on the Upper Tigris river, with capital city of Assur. •(historical) Of, or characteristic of, or pertaining to the ancient nation and empire, including the northern half of Mesopotamia, with capital city of Nineveh. formsAssyrians