Source : Webster's Revised Unabridged Dictionary (1913)

Mail \Mail\, v. t.
   1. To arm with mail.

   2. To pinion. [Obs.]

Mail \Mail\, n. [OE. male bag, OF. male, F. malle bag, trunk,
   mail, OHG. malaha, malha, wallet; akin to D. maal, male; cf.
   Gael. & Ir. mala, Gr. ? hide, skin.]
   1. A bag; a wallet. [Obs.] --Chaucer.

   2. The bag or bags with the letters, papers, 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.] --Sir W. Scott.

   {Mail bag}, a bag in which mailed matter is conveyed under
      public authority.

   {Mail boat}, a boat that carries the mail.

   {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 \Mail\, n.
   A spot. [Obs.]

Mail \Mail\, n. [F. maille, OF. also maaille, LL. medalia. See
   {Medal}.]
   1. A small piece of money; especially, an English silver
      half-penny of the time of Henry V. [Obs.] [Written also
      {maile}, and {maille}.]

   2. Rent; tribute. [Obs., except in certain compounds and
      phrases, as blackmail, mails and duties, etc.]

   {Mail and duties} (Scots Law), the rents of an estate, in
      whatever form paid.

Mail \Mail\, n. [OE. maile, maille, F. maille a ring of mail,
   mesh, network, a coat of mail, fr. L. macula spot, a mesh of
   a net. Cf. {Macle}, {Macula}, {Mascle}.]
   1. A flexible fabric made of metal rings interlinked. It was
      used especially for defensive armor. --Chaucer.

   {Chain mail}, {Coat of mail}. See under {Chain}, and {Coat}.

   2. Hence generally, armor, or any defensive covering.

   3. (Naut.) A contrivance of interlinked rings, for rubbing
      off the loose hemp on lines and white cordage.

   4. (Zo["o]l.) Any hard protective covering of an animal, as
      the scales and plates of reptiles, shell of a lobster,
      etc.

            We . . . strip the lobster of his scarlet mail.
                                                  --Gay.

Mail \Mail\, v. t. [imp. & p. p. {Mailed}; p. pr. & vb. n.
   {Mailing}.]
   To deliver into the custody of the postoffice officials, or
   place in a government letter box, for transmission by mail;
   to post; as, to mail a letter. [U. S.]

   Note: In the United States to mail and to post are both in
         common use; as, to mail or post a letter. In England
         post is the commoner usage.

Source : WordNet®

mail
     v 1: send via the postal service; "I'll mail you the check
          tomorrow" [syn: {get off}]
     2: cause to be directed or transmitted to another place; "send
        me your latest results"; "I'll mail you the paper when
        it's written" [syn: {post}, {send}]

mail
     n 1: the bags of letters and packages that are transported by the
          postal service
     2: the system whereby messages are transmitted via the post
        office; "the mail handles billions of items every day";
        "he works for the United States mail service"; "in England
        they call mail `the post'" [syn: {mail service}, {postal
        service}, {post}]
     3: a conveyance that transports mail
     4: any particular collection of letters or packages that is
        delivered; "your mail is on the table"; "is there any post
        for me?"; "she was opening her post" [syn: {post}]
     5: (Middle Ages) flexible armor made of interlinked metal rings
        [syn: {chain mail}, {ring mail}, {chain armor}, {chain
        armour}, {ring armor}, {ring armour}]

Source : Free On-Line Dictionary of Computing

mail
     
         1. {electronic mail}.
     
        2. The {Berkeley Unix} program for composing and reading
        {electronic mail}.  It normally uses {sendmail} to handle
        delivery.
     
        {Unix manual page}: mail(1)
     
        (1997-12-03)