HEREUPON Meaning of HEREUPON in English hereupon BrE AmE ˌhɪə r ə ˈpɒn ◂ AmE \ ˈhɪr ə pɑːn -pɔːn, ˌ••ˈ• Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012