Princeton's WordNet

1. dirty, soiled, unclean(adj)

   soiled or likely to soil with dirt or grime

   "dirty unswept sidewalks"; "a child in dirty overalls"; "dirty slums"; "piles of dirty dishes"; "put his dirty feet on the clean sheet"; "wore an unclean shirt"; "mining is a dirty job"; "Cinderella did the dirty work while her sisters preened themselves"

2. unclean, impure(adj)

   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"-Leviticus 11:3

Wiktionary

1. unclean(Adjective)

   dirty, soiled or foul

2. unclean(Adjective)

   not moral or chaste

3. unclean(Adjective)

   ritually or ceremonially impure or unfit

Webster Dictionary

1. Unclean(adj)

   not clean; foul; dirty; filthy

2. Unclean(adj)

   ceremonially impure; needing ritual cleansing

3. Unclean(adj)

   morally impure

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