worn or shabby from overuse or (of pages) from having corners turned down; "a somewhat dog-eared duke...a bit run down"-Clifton Fadiman; "an old book with dog-eared pages"

page corners that have been folded by people who have so little respect for books that they cannot be bothered to use a bookmark.

Worn or ragged, usually referring to the edges of pages and binding. Corners of pages turned down like a dog's ear.

Book pages which have been folded over in the corners. Some people do this to mark their place in a book.