1. the side of a hill or mountain being logged 2. one side of a tree, log, or cant 3. the wedge-shaped notch of wood removed from a tree's base during felling 4. sawmilling the flat side or cut side of a piece of lumber 5. grading the surface on which the grade or quality is mainly judged in trees, logs, square-cut timber, veneer, coreboard, or panels undercut 6. turpentining or resin tapping the roughly vertical or longitudinal strip on a bole that is cleared of outer bark, initially cut and regularly chipped in a smooth or herringbone manner to yield oleoresin, often referred to as a catfaceThis definition last updated 10/24/2008