Pretentious display meant to impress others; boastful showiness.(noun)
Archaic The act or an instance of showing; an exhibition.(noun)
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 "ostentation" in a sentence
"Wildside Siding $3 per square foot; wild side camo. com For those who still have money to spend, ostentation is out."
"Another simile comes to mind when thinking about the comparison: The haiku were slim, efficient tidy bodies — healthy, lacking in ostentation and self-assured about themselves."
"As for the painters who commanded these extraordinary prices, they rivalled each other in ostentation and vanity."