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2.
using big or important words in order to impress
the american psycho feigned intelligence by being grandiloquent
by bond.jane bond. August 29, 2003
 
1.
gran-DIL-uh-kwuhnt, adjective:
Lofty in style; pompous; bombastic. Full of fine words and fancy expressions - marked by the use of impressive-sounding but mostly meaningless words and phrases.
He became more than usually grandiloquent as if to make up for the years of silence with words of gold.
by JRob July 26, 2006