1. plural of postbag; large bags used by postal services to carry mail
Usage: British English
2. the total amount of mail received by a person, organization, or publication
Usage: British English; often used in media contexts

Examples

• The postal workers loaded several heavy postbags onto the delivery truck.
• The newspaper received full postbags of letters from angry readers.
• Christmas postbags are always much heavier than usual.
• The radio show’s postbags were overflowing with listener feedback.
• Mail sorters emptied the postbags at the distribution center.
• The celebrity’s postbags contained thousands of fan letters.