tongue and groove



  • lumber machined to have a groove on one side and a protruding tongue on the other, so that pieces will fit snugly together, with the tongue of one fitting into the groove of the other.
  • A type of lumber or precast concrete pile having mated projecting and grooved edges to provide a tight fit, abbreviated "T&G."

Real Estate

  • noun a type of joint between planks in which a projecting ridge on the edge of one plank fits into a groove on the edge of another