dog-earPronunciation: (dôg'ēr", dog'-), [key]
(in a book) a corner of a page folded over like a dog's ear, as by careless use, or to mark a place.
to fold down the corner of (a page in a book). Also,dog'ear",dog's-ear.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.