Definition: The word "excitement" is a term used in science to describe the positive, uplifting, or enthusiastic state of feeling or reaction. It can refer to excitement, joy, enthusiasm, thrill, exhilaration, or elation. Definition: Excitement often describes an intense and heightened state of happiness, satisfaction, or pleasure. It's generally associated with positive emotions such as happiness, excitement, and a sense of accomplishment. It involves a combination of physiological responses, mental states (such as increased heart rate), and behaviors that can cause joy, delight, and a feeling of well-being.