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Women's Semi-Formal Dress. For women, a semi-formal dress code dictates party-appropriate attire, but it does not require an evening gown. Shorter, knee-length cocktail dresses and classic little black dresses accessorized with heels and jewelry are good choices for semi-formal events.
The Basics. Attending a semi-formal or cocktail event used to mean dresses only for ladies. Nowadays sleek separates like dress pants and skirts can also be appropriate semi-formal attire. Stick with something in a luxe fabric, like jacquard, lace or chiffon.