a hole made by boring or piercing:the perforations allow water to enter the well
a small hole or row of small holes punched in a sheet of paper, e.g. of postage stamps, so that a part can be torn off easily.
[mass noun] the action or state of perforating or being perforated:there was evidence of intestinal perforation
late Middle English: from medieval Latin perforatio(n-), from the verb perforare