noun

• (now regional) A bag or wallet.
  "What, loo, man, see here of dyce a bale; / A brydelynge caste for that is in thy male!"
• The (physical) material conveyed by the postal service.
  "It should be in your mail today, unless the post office lost it!"
• (dated) A stagecoach, train or ship that delivers such post.
  "All trains stop at all stations, with the exception of a few "local" stations near Mombasa and an odd flag stop or two usually missed by the mails."
• (uncountable) Electronic mail, e-mail: a computer network–based service for sending, storing, and forwarding electronic messages.
  "Yahoo Mail has been providing mail service since 1997."

verb

• (ditransitive) To send (a letter, parcel, etc.) through the mail.
• (ditransitive) To send by electronic mail.
  "Please mail me the spreadsheet by the end of the day."
• (transitive) To contact (a person) by electronic mail.
  "I need to mail my tutor about the deadline."

noun

• (uncountable, history) Armour consisting of metal rings linked together.
  "The knight is laid in his mail, only the hands and face being bare."
• (uncountable, by extension, now fiction, fantasy) Armour consisting of small plates linked together.
• (nautical) A contrivance of interlinked rings, for rubbing off the loose hemp on lines and white cordage.
• (obsolete, rare) A spot on a bird's feather; by extension, a spotted feather.
  "[T]he moorish-fly: made with the body of duskish wool; and the wings made of the blackish mail of the drake."

verb

• (transitive) To arm with mail.
• (transitive) To pinion.