Pronunciation: (plā'nur),[key] —n. 1. Carpentry.a power machine for removing the rough or excess surface from a board.
2. Metalworking.a machine for cutting flat surfaces, having a cutting tool supported by an overhead frame beneath which the work slides back and forth. Cf. shaper (def. 2).
3. Typesetting.a block of smooth, hard wood for leveling the type in a chase by tapping with a mallet.