high-flown 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. pretentious (especially with regard to language or ideals)
   "high-flown talk of preserving the moral tone of the school"; "a high-sounding dissertation on the means to attain social revolution"
   high-flown  high-sounding  inflated