Meaning : Pretentious (especially with regard to language or ideals).
Example :
High-flown talk of preserving the moral tone of the school.
A high-sounding dissertation on the means to attain social revolution.
Synonyms : high-sounding, inflated
Meaning : Of high moral or intellectual value. Elevated in nature or style.
Example :
An exalted ideal.
Argue in terms of high-flown ideals.
A noble and lofty concept.
A grand purpose.
Synonyms : elevated, exalted, grand, high-minded, idealistic, lofty, noble-minded, rarefied, rarified, sublime