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HankronIn the baseball and relatied hobbies, a publication's suppliment is:
1) a print that was included in the book but not physically attached. An example being the loose map folded and stuck in a National Geographic. If you get a National Geographic and shake it by its spine, the suppliment falls out.
2) an attached print but one that was obviously designed to be removed to be its own item. An example would be that same map but stapled to the inside so it wouldn't fall out during mailing.