\Un*chris"tian\, a. [Pref. un- not + Christian.]
1. Not Christian; not converted to the Christian faith;
   infidel.
2. Contrary to Christianity; not like or becoming a
   Christian; as, unchristian conduct.

\Un*chris"tian\, v. t. [1st pref. un- + Christian.]
To make unchristian. [Obs.] --South.