Costume de rigueur
The term "costume de rigueur"[p] (from French language) refers to a strict formal dresscode for the attire worn at a special event or in a particular venue. It is commonly used in invitations to a masquerade ball for the Mardi Gras in Mobile (Alabama)[1][2] or New Orleans Mardi Gras (Louisiana) in the United States. However, the term is also used to describe any rigorous style of attire as worn. As a phrase adapted from French, the term "costume de rigueur" is not italicized in typical usage, although still used in French language.
At a formal masquerade ball during Mardi Gras celebrations in the United States, the stipulation of "costume de rigueur" means that men are required[1] to wear white tie and tails (with white bow tie), and women should wear a full-length evening gown.[2]
See also
Notes
^[p] The term "costume de rigueur" is typically pronounced as "Cos-toom Day Rig-ger" rather than in the formal French style.