POSTERN Meaning of POSTERN in English transcription, транскрипция: [ ˈpəustə:n ]n. 1 a back door. 2 a side way or entrance. [ME f. OF posterne, posterle, f. LL posterula dimin. of posterus: see POSTERIOR] English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012