Unclean, a.
Etymology: [AS. uncl. See Unnot, and Clean.]
1. Not clean; foul; dirty; filthy.
2. Ceremonially impure; needing ritual cleansing. He that toucheth the dead body of any man shall be unclean seven days. Num. xix. 11.
3. Morally impure. "Adultery of the heart, consisting of inordinate and unclean affections." Perkins. -- Un*clean"ly, adv. -- Un*clean"ness, n. Unclean animals (Script.), those which the Israelites were forbidden to use for food. -- Unclean spirit (Script.), a wicked spirit; a demon. Mark i. 27.
Shades of meaning
Fernald lists unclean only as an antonym, under pure.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given