n. A falling or settling downward; a subsidence.n. The process of excavating downward through the earth, as in mining, etc.n. In arch., sculp., etc., a depression; a place hollowed out, whether for decoration or to receive some other feature; a socket.n. In joinery:n. An angular groove or rabbet in the corner of a board.n. The operation of making or of finishing rabbets.Causing to sink, subside, or gradually disappear: as, a sinking weight; causing the sensation of sinking or fainting: as, a sinking apprehension or anxiety.n. In piquet, the manœuver of calling only a part of a combination, so as to conceal the strength of the hand for playing: usually resorted to only when the player knows his adversary has no better call.