/perr'feuh ray"sheuhn/ , n.
1. a hole, or one of a series of holes, bored or punched through something, as those between individual postage stamps of a sheet to facilitate separation.
2. a hole made or passing through a thing.
3. the act of perforating.
4. the condition or state of being perforated.
[ 1400-50; late ME perforation- (s. of perforatio ) a boring through. See PERFORATE, -ION ]