SPONTANEOUS Meaning of SPONTANEOUS in English spontaneous BrE AmE ( ˌ ) spɒn ˈteɪn i‿əs spən- AmE \ spɑːn-▷ spontaneous|ly li▷ spontaneous|ness nəs nɪs Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012