noun a plane made like a spokeshave, for working the inside edges of circular sashes.
2. router ·noun a plane with a hooked tool protruding far below the sole, for smoothing the bottom of a cavity.
3. router ·add. ·noun a machine with a rapidly revolving vertical spindle and cutter for scooping out the surface of wood or metal, as between and around the engraved parts of an electrotype.