not clean; dirty.

morally impure; evil; vile

unclean thoughts.

Chiefly Biblical . having a physical or moral blemish so as to make impure according to the laws, esp. the dietary or ceremonial laws

an unclean animal; unclean persons.

noun

filth , filthiness , foulness , griminess , grubbiness , smuttiness , squalor , uncleanliness , defilement , dirtiness , pollution , unwholesomeness