— imperforation , n.
/im perr"feuhr it, -feuh rayt'/ , adj.
1. Also, imperforated . not perforate; having no perforation.
2. Philately. (of a number of stamps joined together) lacking the perforations usually separating individual stamps.
n.
3. an imperforate stamp.
[ 1665-75; IM- 2 + PERFORATE ]