Adulteration

noun

1. The act of adulterating, or the state of being adulterated or debased by admixture with something else, generally of inferior quality; the use, in the production of any professedly genuine article, of ingredients which are cheaper and of an inferior quality, or which are not considered so desirable by the consumer as other or genuine ingredients for which they are substituted.
2. The product or result of the act of adulterating; that which is adulterated.
3. The act of adulterating; corruption, or debasement (esp. of food or drink) by foreign mixture.
4. An adulterated state or product.
5. The action of adulterating, being mixed with extraneous material, illicit substitution of one substance for another.