a. Admissible lawfully into the mail. Opposed to non-mailable. Dangerous items such as explosives, weapons, or corrosive chemicals are often classified by the postal authorities as non-mailable. [ U.S. ] [ 1913 Webster +PJC ]
a. Admissible lawfully into the mail. Opposed to non-mailable. Dangerous items such as explosives, weapons, or corrosive chemicals are often classified by the postal authorities as non-mailable. [ U.S. ] [ 1913 Webster +PJC ]