A Veil

1. Something hung up or spread out to hide or protect the face, or hide an object from view; usually of gauze, crepe, or similar diaphanous material.
2. (figurative) Anything that partially obscures a clear view.
3. A cover; disguise; a mask; a pretense.
4. A covering for a person or thing; as, a caul (especially over the head)
5. (biology) The calyptra of mosses.
6. (zoology) velum (A circular membrane round the cap of a medusa).
7. (mycology) A thin layer of tissue which is attached to or covers a mushroom.
8. (mycology) A membrane connecting the margin of the pileus of a mushroom with the stalk; a velum.
9. An obscuration of the clearness of the tones in pronunciation.
10. (figurative, parapsychology) That which separates the living and the spirit world.