casual

In the European tradition, casual is the dress code that emphasizes comfort and personal expression over presentation, formality and conformity. More simply, "casual" can be defined as something relaxed, occasional, not planned, or informal. It includes a very wide variety of costume, so it is perhaps better defined by what it is not than what it is. The following are not considered casual wear:

• Ceremonial dress such as royal robes and full dress military costume
• Formal wear such as white tie.
• Semi-formal such as black tie.
• Informal business professional wear such as suits and ties.