What does "rabbet" mean?

Additional senses

1. 2.(Carp.) A longitudinal channel, groove, or recess cut out of the edge or face of any body; especially, one intended to receive another member, so as to break or cover the joint, or more easily to hold the members in place; thus, the groove cut for a panel, for a pane of glass, or for a door, is a rabbet, or rebate.
2. 3.Same as Rabbet joint, below. Rabbet joint (Carp.), a joint formed by fitting together rabbeted boards or timbers; -- called also rabbet. -- Rabbet plane, a joiner's plane for cutting a rabbet. Moxon.