adjective [usually ADJECTIVE noun] If you describe something as fancy, you mean that it is special, unusual, or elaborate, for example because it has a lot of decoration.

Haute couture (French for 'high sewing' or 'high dressmaking'; IPA: [ˌoːt kuˈtyʁ]) refers to the creation of exclusive fashions. It is a common term for custom-fitted clothing as produced primarily in Paris but also in other fashion capitals such as New York, London, and Milan.

Fancy dress is clothing that you wear for a party at which everyone tries to look like a famous person or a person from a story, from history, or from a particular profession.

Classy and sophisticated clothing is typically tailored and form-fitting (not too tight, but you can show off your figure). Skirts should hit just above or below the knee, as should your classy dresses.