mailpack means A collection of published, printed materials, and sometimes other objects, placed in a container (typically an envelope) and sent through the mail to a specific person or postal address. Lexicurio rates it Sui generis — a strength score of 93 out of 100.
Etymology
From mail + pack.
noun
- A collection of published, printed materials, and sometimes other objects, placed in a container (typically an envelope) and sent through the mail to a specific person or postal address.