Definitions for "Hollow-Core Door"
Interior doors are frequently constructed of thin plywood or Masonite sheets that are bonded to a frame. The inside or core of the door is hollow. This reduces weight yet provides good insulation.
A door with a skeleton framework to which plywood or hard wood is glued to both sides. It is lighter and less expensive than a solid door.
Flush door constructed with two skins or door faces separated by stiles and rails at the perimeter. Generally a honeycomb type support is used inside the door between the two faces.