rarified in WordNet English dictionary

1. of high moral or intellectual value; elevated in nature or style
   "an exalted ideal"; "argue in terms of high-flown ideals"- Oliver Franks; "a noble and lofty concept"; "a grand purpose"
   exalted  elevated  sublime  grand  high-flown  high-minded  lofty  rarefied  rarified  idealistic  noble-minded 
   
2. having low density
   "rare gasses"; "lightheaded from the rarefied mountain air"
   rare  rarefied  rarified 
   

rarified in English Wiktionary