1.affectedly grand or important; pompous
2.more complicated or elaborate than necessary; overblown
3.grand in an imposing or impressive way.
4.Having an exaggerated belief in one's importance, sometimes reaching delusional proportions, and occurring as a common symptom of mental illnesses, as manic disorder.
1. A grandiose scheme
2. He had a very grandiose and narcissistic personality.