1. Pretentious (especially with regard to language or ideals)
   "high-flown talk of preserving the moral tone of the school";
   - high-sounding, inflated
    
2. Of superior moral, intellectual, or spiritual quality; rising above the ordinary or mundane
   "argue in terms of high-flown ideals";
   - exalted, elevated, sublime, grand, lofty, rarefied, rarified

See also: high-minded, idealistic, noble, noble-minded, pretentious