Ego ideal refers to a representation in the child of Values that are approved by the parents. It is present in the Superego as a concern with movement toward perfectionist goals.
Ego ideal refers to the individual's model of how the perfect person should be. Moreover, it is a set of positive standards, ideals, and ambitions that represent the way a person would like to be.
Ego ideal is the internal object from self-psychology that represent the perfect self if it were achievable. The ego ideal is developed through the process of idealizing parents.
Other /More definition:
Ego ideal refers to the person's model of how the perfect person should be.