'mail bag' definitions:

Definition of 'mail bag'

From: GCIDE
  • mailbag \mail"bag`\, mail bag \mail bag\n. A bag in which mailed matter is conveyed or shipped under public authority.
  • Syn: mail pouch. [WordNet 1.5]
  • 2. A letter carrier's shoulder bag; as, in England they call a mailbag a postbag.
  • Syn: postbag. [WordNet 1.5] mailboat