What is Bookmark?

Legal Definition
A bookmark is a thin marker, commonly made of card, leather, or fabric, used to keep the reader's place in a book and to enable the reader to return to it with ease. Other frequently used materials for bookmarks are paper, metals like silver and brass, silk, wood, cord (sewing), and plastic. Many bookmarks can be clipped on a page with the aid of a page-flap.
-- Wikipedia
Legal Definition
1. a feature on the internet browser that lets a user see a site they visited before. A saved link is used. AKA favorites. 2. Inserting a placeholder to go back to a point without scrolling through the whole document.