English Dictionary

perforation

noun

The act of perforating or the state of being perforated. / Any opening in a solid object. / (medicine) An abnormal opening in an organ, such as a rupture.

The perforation on the paper made it easy to tear.

意味（1）

The act of perforating or the state of being perforated.

意味（2）

Any opening in a solid object.

意味（3）

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

意味（4）

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

意味（5）

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