Related topics: Mail
mail·bag /ˈmeɪlbæɡ/ noun [countableC] 1. TCMa large strong bag used for carrying mail on trains etc 〔火车等运送邮件的〕邮件袋,邮包
2. American EnglishAmETCM a bag used to deliver letters to people’s houses 〔向住户递送邮件用的〕邮袋 SYN British English postbag