Enthusiastic/ɪnˌθuːziˈæstɪk/ Definition 1 of 1Pro Tip 1/3Genuine Interest Use it when you have real, not just polite or pretend, excitement for something. His enthusiastic support for the charity was contagious. Pro Tip 2/3Positive Emotion It implies a positive feeling and outlook, rather than a neutral or negative one. She was enthusiastic about meeting her new classmates. Pro Tip 3/3Expressive Energy Often associated with visible excitement or energy, such as smiles or lively gestures. He gave an enthusiastic wave when he saw his friend.