DICT.TW Dictionary Taiwan

 Mail n.
 1. A bag; a wallet. [Obs.]
 2. The bag or bags with the letters, papers, or other matter contained therein, conveyed under public authority from one post office to another; the whole system of appliances used by government in the conveyance and delivery of mail matter.
    There is a mail come in to-day, with letters dated Hague.   --Tatler.
 3. That which comes in the mail; letters, etc., received through the post office.
 4. A trunk, box, or bag, in which clothing, etc., may be carried. [Obs.]
 Mail catcher, an iron rod, or other contrivance, attached to a railroad car for catching a mail bag while the train is in motion.
 Mail guard, an officer whose duty it is to guard the public mails. [Eng.]
 Mail train, a railroad train carrying the mail.

 mail train
      n : a train that carries mail