RAB'BET, verb transitive

1. To pare down the edge of a board or other piece of timber, for the purpose of receiving the edge of another piece by lapping and thus uniting the two.

2. To lap and unite the edges of boards, etc. In ship carpentry, to let the edge of a plank into the keel.

RAB'BET, noun A cut on the side of a board, etc. to fit it to another by lapping; a joint made by lapping boards, etc.