Got this word from Dan Brown, The Lost Symbol

Similar to everyone, I had the impresion this word was only used for things related to cults or mysterious unexplainable events or objects.

However, according to free dictionary, it can be used as follows –

To become concealed or hidden from view or have its light extinguished;

“The beam of light occults every so often”

Although there was another meaning as well seen below –

occult – supernatural practices and techniques;

“he is a student of the occult”