An unveiled face or building means that something has been made visible again after being hidden. You might see an unveiled statue in a museum.
When we talk about unveiling something, it's often in the context of making something visible for the first time. This could be a new movie premiere where the whole film is shown to the public for the first time - think of it as being unveiled on the big screen. It can also happen with art exhibitions, where paintings or sculptures are put up on display for people to see after being kept hidden away in storage.
To remove a veil from; to uncover; to reveal something hidden.
Not wearing, or not covered by, a veil.
