noun

• 1Engineering
  A joint between metal pipes in which one pipe is cut to fit around the other. Also: a metal joint, used chiefly with sheet metal, in which the edge of one member is bent over the upturned edge of the next.

• 2Anatomy Zoology
  A bone joint in which the articulating surfaces are convex in one direction and concave in the other, allowing movement in two axes.

• 3A joint in which the ends of adjoining blocks are shaped to direct rainwater away from the mortar in the joint.

• 4Woodworking
  A joint used to join an upright timber to a horizontal one, formed by cutting a notch in one timber to receive a corresponding projection or tenon cut in the other.