POSTMARK Meaning of POSTMARK in English postmark noun, verb BrE AmE ˈpəʊs t mɑːk AmE \ ˈpoʊs t mɑːrk▷ postmark|ed t▷ postmark|ing ɪŋ▷ postmark|s s Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012