1. 炫耀；夸示；卖弄
If you describe someone's behaviour as ostentation, you are criticizing them for doing or buying things in order to impress people.
1. pretentious or showy or vulgar display
2. lack of elegance as a consequence of being pompous and puffed up with vanity
Synonym: ostentatiousnesspompositypompousnesspretentiousnesspuffinesssplashinessinflation
3. a gaudy outward display