What is the irony in "The Great Gatsby"?

The irony in Fitzgerald’s “The Great Gatsby” is conveyed in the title. The word “great” implies that Gatsby is a hero, seeking true love and living a great life. However, it is a dishonest life making him appear more as a sideshow freak to those around him.

Gatsby left behind his humble, Midwestern lifestyle but gained his Eastern social status and wealth through illegal activities. Those with legitimate, family fortunes had no respect for him and viewed him as more of a caricature of himself. His friend, Nick, sees the honest and great love Gatsby is seeking, yet also sees the great fraud he is living.