gran·di·ose 
(grăndē-ōs′, grăn′dē-ōs)
(grăndē-ōs′, grăn′dē-ōs)adj.
1. Characterized by greatness of scope or intent; grand: a grandiose plan to develop the city's waterfront.
2. Characterized by excessive self-importance or affected grandeur; pompous: "It's important ... for judges not to be rattled by political attacks into grandiose assertions of judicial supremacy" (Jeffrey Rosen).
[French, from Italian grandioso, from grande, great, from Latin grandis.]
grandi·ose′ly adv.
gran′di·osi·ty (-ŏsĭ-tē) n.