SEDILIA Meaning of SEDILIA in English [ sɪ'dɪlɪə ]■ plural noun ( sing. sedile sɪ'dʌɪli ) a group of three stone seats for clergy in the south chancel wall of a church.OriginC18: from L., 'seat'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004