Characterized by greatness of scope or intent; grand. See Synonyms at grand.(adjective)
Characterized by feigned or affected grandeur; pompous.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "grandiose" in a sentence
"But Wednesday's speech - which Gingrich himself called "grandiose" - could actually resonate politically in Florida, where space exploration is good politics 14 miles away from Cape Canaveral."
"Desert landscapes with unspeakable monsters hiding in grandiose mysterious structures, a dread and a trembling for an amateur adventurer and a professional curiosity for Sean Connery-like types."
"The main grandiose building covered with ceramic scenes glorifying Soviet achievements is closed."