SEMITRAILER Meaning of SEMITRAILER in English semitrailer BrE AmE ˈsem i ˌtreɪl ə AmE \ ˈsem aɪ ˌtreɪl ə r -i- ▷ semitrailer|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012