1. A bag; a wallet.
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)
4. A trunk, box, or bag, in which clothing, etc, may be carried. 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. Mail train, a railroad train carrying the mail.
2. Hence generally, armor, or any defensive covering.
Origin: oe. 4a2