Language can certainly communicate emotions, but growing research suggests that language also helps constitute emotion by cohering sensations into specific perceptions of anger, disgust, fear, and other emotion categories. The powerful role of language in emotion is predicted by a constructionist approach, which suggests that emotions occur when sensations are categorized using emotion category knowledge supported by language. We discuss the accumulating evidence from social-cognitive, neuropsychological, cross-cultural, and neuroimaging studies that emotion words go beyond communication to help constitute emotional perceptions, and perhaps even emotional experiences. We look ahead to current directions in research on emotional intelligence, emotion regulation, and psychotherapy.