endpaper
/ˈendpeɪpər/Definitions
1. noun
The paper that covers the inside of the covers of a book, often decorated with a design.
“The endpaper of the old leather book was beautifully adorned with gold filigree.”
2. verb
To decorate or cover the inside of the covers of a book with paper.
“The bookbinder carefully endpapered the leather-bound volume with a matching design.”
3. verb
To fill in the margins of a book with decorative paper.
“The artist chose to endpaper the blank margins of her sketchbook with colorful patterns.”