—n. 1. wood, esp. oak and usually in the form of paneling, for lining interior walls.
2. the lining itself, esp. as covering the lower portion of a wall.
3. a dado, esp. of wood, lining an interior wall.
4. Brit.oak of superior quality and cut, imported from the Baltic countries for fine woodwork.
—v.t. to line the walls of (a room, hallway, etc.) with or as if with woodwork: a room wainscoted in oak.