- having no holes or openings; unpierced
- having a straight edge without perforations: said of a postage stamp, etc.
- Anat. lacking the normal opening
Origin of imperforate; from in- + perforate
an imperforate stamp
- Having no opening; not perforated.
- Not separated by rows of perforations: imperforate sheets of stamps.
- Medicine Lacking a normal opening: an imperforate anus.
An imperforate stamp.
- Not perforated.
- (philately) A postage stamp that has not been perforated.