Which word describes a person who might display ostentatious wealth or lavishness?

The term that accurately describes a person who displays ostentatious wealth or lavishness is "ostentation." This word is derived from the verb "ostentatious," which relates to actions or behaviors intended to attract notice and impress others, particularly concerning one’s wealth. When someone engages in ostentation, they tend to showcase their material possessions or luxurious lifestyle in a way that draws attention to their affluence.

This notion of showing off is integral to the meaning of the word and highlights the desire to be seen as wealthy or successful, often leading to perceptions of extravagance or excessive display. Ostentation can manifest in various forms, such as wearing an exorbitantly priced watch, living in an extravagant home, or throwing lavish parties, all done with the intent to impress or elicit admiration from others.