Máscara
El rostro que muestras en público — el deliberado, el negociado.
A mask in a dream is the dictionary's image of the public face. Wearing a mask in a dream is the dream noting that you have been performing a version of yourself. The reading depends on whether the mask fits — sometimes the public face is honest, sometimes it is a strain.
Taking off the mask in the dream is the dictionary's image of choosing to be seen without performance.
Where you often see it. A mask handed to you. A mask you cannot remove. A mask you choose to put on. The dream uses the mask for the face you show in public — the deliberate one, the negotiated one.
What it is not. A mask is not always deceptive. The dictionary reads it as the chosen public-facing self.
Related in the dictionary. Read mask with face, clothes, uniform, and any scene of self-presentation.