Fest/fest/ Definition 1 of 2Pro Tip 1/3Specific Themes Fests often celebrate specific interests, such as food, music, or culture. The city's annual jazz fest attracts musicians from all over the world. Pro Tip 2/3Planned Activities 'Fest' implies there are organized events or activities for attendees. The literature fest featured book signings and writing workshops. Pro Tip 3/3Joyful Atmosphere A fest is typically a happy and celebratory occasion. Everyone was in high spirits at the annual flower fest.