Outfit/ˈaʊtfɪt/ Definition 1 of 3Pro Tip 1/3Event Specific An outfit is often chosen based on the type of event, like casual or formal gatherings. He picked out a casual outfit for the beach party. Pro Tip 2/3Matching Pieces Think of an outfit as a coordinated set where all pieces match or complement each other. Her outfit consisted of a blue skirt and a matching blouse. Pro Tip 3/3Cultural Varies What's considered an appropriate outfit can vary greatly across different cultures. For the Indian wedding, she chose a traditional outfit.