If you describe someone as unworldly, you mean that they are not interested in having a lot of money or possessions. Kitty's family was unworldly, unimpressed by power, or money. worldly
not wise in the ways of the world; "either too unsophisticated or too honest to promise more than he could deliver"; "this helplessly unworldly woman"- Kate O'Brien
If you describe someone as unworldly, you mean that they have not experienced many things in their life and do not know what sort of things usually happen to other people during their lives. She was so young, so unworldly He is a little unworldly about such matters. = naive