wild orange n 1: small fast-growing spiny deciduous Chinese orange tree bearing sweetly scented flowers and decorative but inedible fruit: used as a stock in grafting and for hedges [syn: {trifoliate orange}, {trifoliata}, {Poncirus trifoliata}] 2: small flowering evergreen tree of southern United States [syn: {cherry laurel}, {laurel cherry}, {mock orange}, {Prunus caroliniana}]