lap joint

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A joint, as between two boards or metal parts, in which the ends or edges are overlapped and fastened together, usually so as to produce a flush or continuous surface.

from The Century Dictionary.

• noun A joint in which one edge of a board, plank, or plate overlaps the edge of another piece, the edges being partly cut away so that the pieces are in parallel relation with each other.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun joint made by overlapping two ends and joining them together