Pronunciation: (gran'dē-ōs"), [key]
1. affectedly grand or important; pompous: grandiose words.
2. more complicated or elaborate than necessary; overblown: a grandiose scheme.
3. grand in an imposing or impressive way.
4. Psychiatry.having an exaggerated belief in one's importance, sometimes reaching delusional proportions, and occurring as a common symptom of mental illnesses, as manic disorder.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.