The act of cutting into a substance.
A cut-back
A cut, especially one made by a scalpel or similar medical tool in the context of surgical operation; the scar resulting from such a cut.
The act of perforating or the state of being perforated.
That portion of a surface that remains after an open disk is removed from it.
A series of holes punched through something in order to assist in separating parts.
An abnormal opening in an organ, such as a rupture.
Any opening in a solid object.