1. Pouch used in the shipment of mail
   - mail pouch, postbag [Brit] 
2. Letter carrier's shoulder bag
   "in Britain they call a mailbag a postbag"
   - postbag [Brit]

Derived forms: mailbags

Type of: bag, pouch

• cascarilla bark
• case
• case agreement
• case history
• case in point
• case knife
• case law
• case officer
• case shot
• case study
• case-by-case
• case-fatality proportion
• case-hardened
• case-hardened steel
• case-to-infection proportion
• case-to-infection ratio
• caseate
• caseation
• casebook
• cased
• caseful
• caseharden
• casein
• casein glue
• casein paint