1n. a precipitous river bank, eroded by the current.
1897  While on his way home from the Rosebud in the frost and storm the horse on which he was riding went over the cut bank near the iron bridge on the Bow.
1954  The cabin stood on a high cutbank looking straight north across the Liard.
1962  . . . I couldn't remember just which of the cut banks along the lake was the one where I had seen the nodules in place.
2n. either one of the two banks of a river that has eroded a course deep into its bed.
1897  The banks were high, towering in some places three, four or five hundred feet above the river; here abrupt and precipitous, consisting of cut banks of stratified clay; in other places more receding, but by a gradual slope rising, beneath dense foliage, to an equal elevation.
1962  . . . a narrow bridge of land is known as a "hog's back" and the precipitous escarpments of clay bordering on a river are "cut-banks."
3n. a hill having a steep front resulting from erosion.