1. A cut or incision made by a saw or the like in a piece of wood.
2. Mining, a deep cut a few inches high, used to undermine a portion of a coal or mineral seam.
3. The act of cutting or carving.
Origin: Before 1000; Middle English kerf, kirf, Old English cyrf a cutting (cognate with Old Frisian kerf ); akin to carve. [Old English cyrf a cutting; related to Old English ceorfan to carve ]