Attribution refers to an inference about the cause of our own or another’s behaviour. It is a perceptual process be which we observe what people do and then try to figure out their personality or disposition
Other /More definition:
Attribution refers to the mental process of assigning causes to events, including making inferences about the causes of one's own behavior, and that of others. It is the cognitive process of assigning meaning to a symptom or behavior
In Emotion, Attribution is the process of attributing arousal to a particular source.