dog-ear I. transitive verb alsodog's-ear\ˈ ̷ ̷ˌ ̷ ̷\ : to disfigure or damage with a dog-ear < a book for me is something to be read … I want to dog-ear it, to underline it, to annotate it — John Mason Brown > II. noun alsodog's-ear\“\ (pluraldog-earsalsodog's-ears) 1.: the corner of a leaf especially of a book turned down like the ear of a fox terrier 2.: the small bight made in the leech rope of a sail in reefing