rarefied

adjective

Distant from the lives and everyday concerns of ordinary people; esoteric, exclusive, select.
“Philosophical debates can be quite rarefied.”
“The country gentry of old time lived in a rarefied social air: dotted apart on their stations up the mountain they looked down with imperfect discrimination on the belts of thicker life below.”
Elevated in style or nature, sublime; of high intellectual or moral value.
Less dense than usual; thin.
“The air at high altitudes at the top of mountains is rarefied.”