Definition of "perforation" in English

noun

1. The act of perforating or the state of being perforated.

2. Any opening in a solid object.

3. (medicine) An abnormal opening in an organ, such as a rupture.

4. A series of holes punched through something in order to assist in separating parts.

5. (mathematics) That portion of a surface that remains after an open disk is removed from it.