The lip extends usually about a quarter of an inch past the edge of the rabbet.
From the en.wikipedia.org
The gaskets do not appear to fit the glazing rabbet properly, and some are very loose and dry.
From the dailyherald.com
One attractive joint design requires a half-inch rabbet cut along the edges of the sidepieces.
From the charlotteobserver.com
More examples
A rectangular groove made to hold two pieces together
Join with a rabbet joint
A rabbet (also known as rebate) is a recess or groove cut into the edge of a piece of machineable material, usually wood. When viewed in cross-section, a rabbet is two-sided and open to the edge or end of the surface into which it is cut.
A longitudinal channel, groove, or recess cut out of the edge or face of a plank of wood or other material; especially, one intended to fit another member to form a joint; To cut a rabbet in a piece of material
A rectangular, longitudinal groove cut in the corner edge of a board or plank.
A groove cut in a board to receive another board.
A "L" shaped groove cut into the side of a wood component.
A narrow piece of folded metal fastened to the inside upper end of the hive body from which the frames are suspended.
A cut partway through the edge of a board that is used as a part of a joint.