Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of imperforation is as below...

Atresia :: Atresia (n.) Absence or closure of a natural passage or channel of the body; imperforation.

Imperforation :: Imperforation (n.) The state of being without perforation.

Occlusion :: Occlusion (n.) The transient approximation of the edges of a natural opening; imperforation.

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