Ostentation is a pretentious or showy display (gaudy or flashy), usually designed to attract attention. Ostentation is a woman in a fur coat, covered in diamond jewelry, boarding a gold-plated private jet.
The noun ostentation stems from the Latin word ostentationem, meaning "vain display." It is often associated with material items that showcase one's wealth and luxury. Ostentation might come to the minds of the other parents if you drive a Lamborghini to drop your kids off at school. A movie star's gas-guzzling, 400-foot yacht may also be considered by many as a symbol of ostentation.