EMOTION, a vivid feeling and state of excitement induced by the apprehension of some object which arouses an instinctive reaction; e.g., the perception, memory or imagination of any object that threatens danger, and so arouses the instinct of self preservation, induces an emotion of fear. Similarly with the other emotions. (See FEELING, PSYCHOLOGY OF; JAMES-LANGE THEORY OF EMOTIONS; EXPRESSION OF THE EMOTIONS; PSYCHOLOGY.)