Tutu/ˈtuːtuː/ Definition 1 of 3Pro Tip 1/3Ballet Apparel Used exclusively for ballet dancing attire. Indicates a specific dress code. She needed a new tutu for her ballet recital. Pro Tip 2/3Layers Matter The number of layers can signify the skirt's fluffiness and style. Her tutu had seven layers of tulle to add volume. Pro Tip 3/3Not Casual Wear A tutu isn't everyday clothing; it's specific to performances and practice. You wouldn't wear a tutu to a regular party.