'mailbag' definitions:

Definition of 'mailbag'

From: WordNet
noun
Pouch used in the shipment of mail [syn: mailbag, mail pouch]
noun
Letter carrier's shoulder bag; "in Britain they call a mailbag a postbag" [syn: mailbag, postbag]

Definition of 'mailbag'

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