[adj] 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"
[adj] reserved for an elite group
[adj] having low density; "rare gasses"; "lightheaded from the rarefied mountain air"
Synonyms
exalted, high-flown, high-minded, idealistic, lofty, noble, noble-minded, rare, rarified, reserved, thin