adj. Not resembling or having the qualities of a human being.
the GNU version of the Collaborative International Dictionary of English
adj. Not human; inhuman.
The Century Dictionary and Cyclopedia
Not human; destitute of human qualities. Inhuman.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. divested of human qualities or attributes
Word Usage
"Unless some dude behavior is "unhuman" and should therefore be phased out, but good luck convincing me that some good, clean fun among guys is wrong because most women wouldn't like the same."