—adj.u-dul'tur-it, -tu-rāt"), [key]
—v., -at•ed, -at•ing,
to debase or make impure by adding inferior materials or elements; use cheaper, inferior, or less desirable goods in the production of (any professedly genuine article): to adulterate food.
2. adulterous (def. 1).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.