Source : WordNet®

rarified
     adj 1: having low density; "rare gasses"; "lightheaded from the
            rarefied mountain air" [syn: {rare}, {rarefied}]
     2: reserved for an elite group [syn: {rarefied}]
     3: 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" [syn:
        {exalted}, {high-flown}, {high-minded}, {lofty}, {rarefied},
         {idealistic}, {noble-minded}]