to keep sth important about yourself a secret from other people, so that they do not know what you really think, what you are really like, etc.
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to keep sth important about yourself a secret from other people, so that they do not know what you really think, what you are really like, etc.
Well, living a lie is not a life.
I'm living a lie. What have I become?
Definiciones del Oxford Advanced Learner's Dictionary, 9.ª edición