"Semi-formal" refers to a dress code that is more polished than casual attire but less formal than black-tie. It typically includes options like a dress shirt and slacks for men, and a cocktail dress or a nice blouse with a skirt or dress pants for women. The goal is to look neat and put-together without the need for overly formal clothing. Events that may call for a semi-formal dress code include weddings, cocktail parties, and certain business functions. This style allows for personal expression while maintaining a level of sophistication appropriate for the occasion.