Knag \Knag\ (n[a^]g), n. [Cf. Prov. G. knagge a knot in wood, Sw. knagg, Dan. knag a hook to hand clothes on, a bracket; Gael. & Ir. cnag peg, knob.] 1. A knot in wood; a protuberance. --Wright.
2. A wooden peg for hanging things on. --Wright.
3. The prong of an antler. --Holland.
4. The rugged top of a hill. [Prov. Eng.] --Halliwell.