exedraPronunciation: /ˈɛksɪdrə, ɪkˈsiːdrə, ɛk-/Definition of exedra noun (plural exedrae /-driː/) Architecture a room, portico, or arcade with a bench or seats where people may converse, especially in ancient Roman and Greek buildings. Origin:Latin, from Greek ex- 'out of' + hedra 'seat'exedra in other Oxford dictionaries Definition of exedra in the US English dictionary