The Collaborative International Dictionary of English v.0.48:

Aramaean \Ar`a*m[ae]an\, Aramean \Ar`a*me"an\, a. [L. Aramaeus,
   Gr. ?, fr. Heb. Ar[=a]m, i. e. Highland, a name given to
   Syria and Mesopotamia.]
   Of or pertaining to the Syrians and Chaldeans, or to their
   language; Aramaic. -- n. A native of Aram.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Aramaean
    adj 1: of or relating to Aram or to its inhabitants or their
           culture or their language [syn: Aramean, Aramaean]
    n 1: a member of one of a group of Semitic peoples inhabiting
         Aram and parts of Mesopotamia from the 11th to the 8th
         century BC [syn: Aramean, Aramaean]