Definitions

1. adjective

relating to or characteristic of the cost of maintaining a certain standard of living or lifestyle, especially one that is expensive or luxurious.

“The king’s sumptuary laws prohibited excessive displays of wealth.”

2. noun

a law or rule regulating the dress, entertainment, or other expenses of people in a particular group or profession.

“The sumptuary laws of the 17th century governed the dress and behavior of the nobility.”