What Does “Unclean” Mean in the Bible?
In the Law of Moses, what could not be eaten or touched before coming close to God. It does not mean dirty.
Where it appears in the Bible
Leviticus 11:47; Acts 10:14-15
What the Bible says
Leviticus 11:47
That you may know the differences of the clean, and unclean, and know what you ought to eat, and what to refuse.
Acts 10:14-15
14But Peter said: Far be it from me; for I never did eat any thing that is common and unclean. 15And the voice spoke to him again the second time: That which God hath cleansed, do not thou call common.
Douay-Rheims Bible (Challoner revision), public domain.
Source: Leviticus 11; RAE, “impuro”