IMPERFORATE Meaning of IMPERFORATE in English [ ɪm'pə:f(ə)rət ]■ adjective1》 (of a postage stamp or a block or sheet of stamps) lacking perforations. 2》 Anatomy & Zoology lacking the normal opening. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004