[rab-it] 
noun, verb, -bet⋅ed, -bet⋅ing.| 1. | a deep notch formed in or near one edge of a board, framing timber, etc., so that something else can be fitted into it or so that a door or the like can be closed against it. |
| 2. | a broad groove let into the surface of a board or the like; dado. |
| 3. | to cut a rabbet in (a board or the like). |
| 4. | to join (boards or the like) by means of a rabbet or rabbets. |
| 5. | to join by a rabbet (usually fol. by on or over). |
ɪt