Fabulous/ˈfæbjələs/ Definition 1 of 2Pro Tip 1/3Emotional Impact Evokes excitement or admiration, often used to emphasize positive qualities more than expected. She looked fabulous in her graduation gown. Pro Tip 2/3Informal Praise Commonly used in casual conversation to express high praise or approval. Your new bike looks fabulous! Pro Tip 3/3Not Understated Less appropriate for modest or small improvements or changes. Their modest home was cozy but not really fabulous.