1.Definition: (of a display) tawdry or vulgar

Related Adjective(s):ostentatious

2.Definition: intended to attract notice and impress others

Related Adjective(s):ostentatious

3.Definition: making claim to or creating an appearance of (often undeserved) importance or distinction

"A pretentious country house", "A pretentious fraud", "A pretentious scholarly edition"