ON- Meaning of ON- in English on- BrE AmE ¦ɒn AmE ¦ɑːn ¦ɔːn ▷ — on-going ˌɒn ˈɡəʊ ɪŋ ◂ AmE ˈɑːn ˌɡoʊ ɪŋ ˈɔːn- Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012