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1. Oxford American Dictionary

   perforation

   • IPA[ˌpərfəˈrāSH(ə)n]

   美式

   • n.
     a hole made by boring or piercing; an aperture passing through or into something；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

   • noun: perforation, plural noun: perforations

2. • 釋義

   n.

   名詞

   • 1. a hole made by boring or piercing; an aperture passing through or into something 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 memos are produced in a continuous strip divided by perforations so that the forms can be detached
   • ▪ the action or state of perforating or being perforated there was evidence of intestinal perforation