Emotional intelligence is defined as the ability to perceive and regulate emotions in oneself and others. It involves being able to recognize one's emotions, understand how they influence thoughts and behavior, and effectively manage them. Emotional intelligence also encompasses the ability to empathize with others, handle interpersonal relationships effectively, and navigate social complexities. It is an important skill in personal and professional development as it can lead to better communication, conflict resolution, and overall success in various areas of life.