Noun
The use of lofty words or phrases; bombast; -- usually in a bad sense.
Source: Webster's dictionaryHegel once observed that comedy is in act superior to tragedy and humourous reasoning superior to grandiloquent reasoning. Although Lincoln does not possess the grandiloquence of historical action, as an average man of the people he has its humour. Karl Marx
the grandiosity of his prose Source: Internet
an excessive ornateness of language Source: Internet