Longman Dictionary of Contemporary English homepage

unclean

 adjective
     
un‧clean
1 biblicalR morally or spiritually bad:
an unclean spirit
2RR unclean food, animals etc are those that a particular religion says must not be eaten, touched etc
3 dirty:
unclean drinking water
—uncleanness noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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