High-flown speeches

[Bassim]

I have tried to use "high-flown speeches" in my sentence, but I am not sure if it is grammatically correct. Would you please correct my mistakes?

Many politicians make high-flown speeches, which if properly analysed, would show no substance and the lack of concrete information and details.

 

[emsr2d2]

I'm familiar with someone being described as a "high flyer" and the adjective "high flying" but "high-flown" means nothing to me, in any context.

 

[Bassim]

According to Longman dictionary: high-flown adj. high-flown language sounds impressive but does not have much real meaning.

I found this text in Clive James' article about the Austrian journalist Karl Kraus.
"Kraus, in the end, might not really have run out of things to say, but he did run out of hope that they might be relevant. His business had been to criticise high-flown speech that concealed base motives."

 

[emsr2d2]

Many politicians make high-flown speeches (no comma here) which, if properly analysed, would show no substance and [strike]the[/strike] a [complete] lack of concrete information and [strike]details[/strike] ​detail.

Given the content of post #3, I have made changes above.