Lacking an opening; for example, an imperforate hymen completely closes the vagina and prevents the outflow of menstrual blood.
Any of several congenital defects in which there is partial or complete obstruction of the anal opening due to a developmental defect. Treatment is by surgery.
Lacking an opening. Occasionally girls at puberty are found to have an imperforate hymen (a fold of membrane close to the vaginal orifice), which impedes the flow of menstrual blood.
An adjective meaning lack of an opening. For example, occasionally the anus fails to develop properly, resulting in partial or complete obstruction of the opening. Sometimes pubertal girls have an imperforate hymen which obstructs the opening to the vagina and prevents menstrual flow of blood draining to the exterior.
The term “imperforate” signifies “without an opening”. It is used to denote a bodily structure, like the hymen or anus, which is expected to have an opening but doesn’t.