rarefied

Adjective

• 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
    

• having low density
  • rare gasses
    
  • lightheaded from the rarefied mountain air
    

Related words

• Synonyms: 
  rare , rarified