high-flown

adjective

1. 1

   of high moral or intellectual value; elevated in nature or style

   an exalted ideal

   argue in terms of high-flown ideals"- Oliver Franks

2. 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