imperforate

UK: /ɪmˈpɜːfərɪt/ US: (im pûr′fər it, -fə rāt′)

WordReference Random House Unabridged Dictionary of American English © 2025

im•per•fo•rate  (im pûr′fər it, -fə rāt′), adj. 

1. Also, im•per′fo•rat′ed. not perforate;
   having no perforation.
2. Stamps [Philately.] (of a number of stamps joined together) lacking the perforations usually separating individual stamps.

n. 

3. Stamps an imperforate stamp.

• im-² + perforate 1665–75

im•per′fo•ra′tion, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

imperforate / ɪmˈpɜːfərɪt -ˌreɪt/, imperforated / ɪmˈpɜːfəˌreɪtɪd/ adjective

1. not perforated
2. (of a postage stamp) not provided with perforation or any other means of separation
   Compare perforate
3. (of a bodily part, such as the anus) without the normal opening

imˌperfoˈration noun