your idea or opinion of yourself, especially your feeling of your own importance and ability自我评价;自我中心;自负;自尊心
That man has such an enormous ego - I've never known anyone so full of themselves!那个人自负得要命——我从来没有见过这么自以为是的人。
I'm glad she got the job - she needed something to boost/bolster her ego (= give her confidence).我很高兴她得到了这份工作——她太需要点什么来增强她的信心了。
specialized psychology in psychoanalysis, the part of a person's mind that tries to match the hidden desires (= wishes) of the id (= part of the unconscious mind) with the demands of the real world(心理分析上的)自我