WordWeb Online

1. Not concerned with the temporal world or swayed by mundane considerations
   "was unworldly and did not greatly miss worldly rewards"
    
2. Not wise in the ways of the world
   "this helplessly unworldly woman";
   - unsophisticated

See also: anchoritic, cloistered, cloistral, conventual, eremitic, eremitical, hermitic, hermitical, monastic, monastical, naif, naïf, naive, naïve, pious, spiritual, unearthly, unmercenary

Antonym: secular