foldout

/ˈfoʊldaʊt/
noun
  1. A page or section that is larger than the normal page size and is folded to fit into a book, magazine, or brochure, and can be opened out.
    • She carefully unfolded the foldout to see the detailed illustration.
    • The magazine included a foldout poster of the solar system.
    • The map in the guidebook was a foldout that showed the entire city center.
adjective
  1. Designed to be folded out or opened up for use.
    • They bought a foldout table for their small apartment.
    • The foldout chair was easy to set up at the picnic.
    • The couch has a foldout bed for guests.