The Collaborative International Dictionary of English v.0.48:
Slavonian \Sla*vo"ni*an\, Slavonic \Sla*von"ic\, a. 1. Of or pertaining to Slavonia, or its inhabitants. [1913 Webster] 2. Of or pertaining to the Slavs, or their language. [1913 Webster]WordNet (r) 3.0 (2006):
Slavonic adj 1: of or relating to Slavic languages [syn: Slavonic, Slavic] n 1: a branch of the Indo-European family of languages [syn: Slavic, Slavic language, Slavonic, Slavonic language]