postbox — At the Post Office postbox /ˈpəʊstbɒks/ noun CEFR A2 A public box where you put letters to be collected and sent. “He dropped the letter into the postbox.” Related words in this scene queuesignstampformpostcardtapereceiptweighcountersendaddressreceivesenderletterlabelenvelopescalewrapparcelpackagemailpostmandeliveryweightboxcourierpostcodeairmaildeliverfragiletracking Practice this word Create worksheet