The Collaborative International Dictionary of English v.0.48:

Assyrian \As*syr"i*an\, a. [L. Assyrius.]
   Of or pertaining to Assyria, or to its inhabitants. -- n. A
   native or an inhabitant of Assyria; the language of Assyria.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Assyrian
    n 1: an inhabitant of ancient Assyria
    2: the language of modern Iraq [syn: Assyrian Neo-Aramaic,
       Assyrian]
    3: an extinct language of the Assyrians in ancient Mesopotamia
       [syn: Assyrian Akkadian, Assyrian]