American English

Definition of mail noun from the Oxford Advanced American Dictionary

      

    mail

     noun
    noun
    NAmE//meɪl//
     
    [uncountable]
     
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  1. 1the official system used for sending and delivering letters, packages, etc. a mail service/train/truck Your check is in the mail. We do our business by mail. see also airmail, snail mail, voice mail
  2. 2letters, packages, etc. that are sent and delivered There isn't much mail today. I sat down to open the mail. Is there a letter from them in the mail? hate mail (= letters containing insults and threats) see also junk mail, return mail, surface mail
  3. 3messages that are sent or received on a computer Check regularly for new mail. see also electronic mail, e-mail
  4. 4= chain mail a coat of mail
See the Oxford Advanced Learner's Dictionary entry: mail