illusion or disillusion (a bit personal folks may not want to read this)

n.

1. 1. An erroneous perception of reality.
   2. An erroneous concept or belief.
2. The condition of being deceived by a false perception or belief.
3. Something, such as a fantastic plan or desire, that causes an erroneous belief or perception.
4. Illusionism in art.
5. A fine transparent cloth, used for dresses or trimmings.

disillusion

n : freeing from false belief or illusions [syn: disenchantment, disillusionment] v : free from enchantment [syn: disenchant] [ant: enchant]

Ok which is better folks? That is the question for the week!