In the European tradition, casual's the dress code which emphasizes comfort and personal expression over presentation and uniformity. It includes a very wide variety of costume, so it's perhaps better defined by what it isn't than what it is. The following aren't considered casual wear: Ceremonial dress such as royal robes and full dress military costume Formal wear such as white tie and black tie Suits Blue jeans and a T-shirt have been described as the "casual uniform". With the popularity… (More on Casual)