Enthuse/ɪnˈθuːz/ Definition 1 of 2Pro Tip 1/3Genuine Excitement Use 'enthuse' when you want to show authentic, intense excitement about a topic. She couldn't stop enthusing about her trip to Spain! Pro Tip 2/3Informal Tone 'Enthuse' is casual and often used in informal conversations with friends. He enthused about the videogame, inviting others to play. Pro Tip 3/3Positive Context The word 'enthuse' fits best in situations with a positive or optimistic tone. After the meeting, everyone was enthusing about the new project.