Bookmark/ˈbʊkmɑːrk/ Definition 1 of 3Pro Tip 1/3Physical Object Usually found in stores selling books; often decorative or with quotes. She used a ribbon as a bookmark in her novel. Pro Tip 2/3Not Only Paper Can also be a small object placed between pages, like a paperclip. I lost my bookmark, so I'm using a paperclip instead. Pro Tip 3/3Memory Aid Helps remember not just pages but also specific details when noted. Write a note on your bookmark to remember key plot points.