Knap (?), n. [AS. cnæp, cnæpp, top, knob, button; cf. Icel. knappr knob, Sw. knapp, Dan. knap button, W., Gael., & Ir. cnap knob, button, and E. knop.] A protuberance; a swelling; a knob; a button; hence, rising ground; a summit. See Knob, and Knop.
The highest part and knap of the same island. Holland.