Ego could be defined as whatever covers up basic goodness. From an experiential point of view, what is ego covering up? It's covering up our experience of just being here, just fully being where we are, so that we can relate with the immediacy of our experience. Egolessness is a state of mind that has complete confidence in the sacredness of the world. It is unconditional well being, unconditional joy that includes all the different qualities of our experience.
Pema Chodron (2000). “When Things Fall Apart: Heart Advice for Difficult Times”, p.80, Shambhala Publications