[Wal.loon] n [MF Wallon, adj. & n., of Gmc origin; prob. akin to OHG Walah Celt, Roman, OE Wealh Celt, Welshman--more at welsh] (1567) 1: a member of a people of southern and southeastern Belgium and adjacent parts of France
2: a French dialect of the Walloons -- Walloon adj