Morally impure; foul with sin; wicked; evil; especially, lewd; unchaste.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. soiled or likely to soil with dirt or grime
adj. having a physical or moral blemish so as to make impure according to dietary or ceremonial laws
Word Usage
"Pork is described as "unclean" and therefore unfit for human consumption along with other types of meat, such as carrion, the carcass of dead animals Chapter 6, Verse 145."