vestido informal
The noun "dress" in spanish is "vestido"
Casual, or neat casual. (Two different types of dress.) Casual is what you might wear around the house when you aren't planning on going out or receiving visitors. Neat casual is when you might dress up a little, say, to go down the street. Also for a funeral, birthday party, or to go to the city. Formal is when you dress for, say, a ceremony; maybe a deb, graduation or wedding.
"white dress" translates to, "vestido blanco" in Spanish.
how do you dress = ¿Cómo te vistes?
Dressing casual means slacks and a dress shirt and nicer shoes.
El vestido
A smart casual dress code is typically an informal but neat attire. It is not as dressy as a formal dress code but it is a step up from business casual.
An upscale casual dress for teen girls will typically be a solid color A-line dress. Sometimes this dress will have a colored sash.
They are in a casual relationship, it's not serious. I decided to dress casual on Friday.
los zapatos
crop dress or long casual dress
dress casual but fancy