† coriunObs.rare—1. [ad.OF.choron, corun, choro, f. L. chorum, chorus, transf. to a kind of musical instrument: cf.Ps.cl. 4 (Vulg.) ‘in tympano et choro’.] An ancient name of a musical instrument. c1205Lay. 7002 Ne cuðe na mon swa muchel of song of harpe & of salteriun, of fiðele & of coriun.