2. (used of persons or behaviors) immoral or obscene
3. having a physical or moral blemish so as to make impure according to dietary or ceremonial laws
unclean meat|and the swine...is unclean to you
4. Not pure; not clean; dirty; foul; filthy; containing something which is unclean or unwholesome; mixed or impregnated extraneous substances; adulterated; as, impure water or air; impure drugs, food, etc.