What is definition gatsby?

"The Great Gatsby" is a novel by F. Scott Fitzgerald published in 1925. The story is set in the Roaring Twenties, a time of social and cultural changes in America. The main character, Jay Gatsby, is a mysterious and wealthy man who throws elaborate parties at his mansion in the hope of winning back the love of his past flame, Daisy Buchanan. The novel explores themes of love, social class, and the American Dream. It is considered a classic work of American literature and has been adapted into various films, plays, and musicals.