ArcadianPronunciation: /ɑːˈkeɪdɪən/Definition of Arcadian noun a native of Arcadia. literary an idealized country dweller. adjective relating to Arcadia. literary relating to an ideal pastoral paradise. Origin: late 16th century: from Latin Arcadius, from Greek Arkadia (see Arcadia)Arcadian in other Oxford dictionaries Definition of Arcadian in the US English dictionary