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early 15c., "hole made through something;" mid-15c., "action of perforating," from Middle French perforation or directly from Late Latin perforationem (nominative perforatio), noun of action from past participle stem of Latin perforare "bore or pierce through," from per- "through" (see per) + forare "to pierce" (see bore (v.1)).
perforation per·fo·ra·tion (pûr'fə-rā'shən)
The act of perforating or the state of being perforated.
An abnormal opening in a hollow organ or viscus, as one made by rupture or injury.