Dreaming of lock and key is both positive and negative sign as per dream meaning and interpretation. The dream means you will find solution to a pestering problem. It also means success. Dreams of lock with a key also mean you finding secrets about someone and it will open up a huge problem in life. It also means you will find out about something that was hidden from you.
Dream of lock and key and you are trying to put key in the
lock in the dream means you will open things that were closed for a longtime.
It also means discovering new information or finding out about a family secret.
Dreams of lock and key and you are not seen in the dream
means you will be investigated for something. It also means in your absence
someone attempting to find out your secrets or things you have hidden.
Dreaming of lock and key and it is not getting opened means
you will make several unsuccessful attempts to achieve something. It also means
frustration.
Please not that watching treasure movies or anything to do
with lock and key during daytime on screen or reading etc. and then having the
dream has no meaning. It is a mere extension of an intense daytime activity.
The dream will have a meaning only when it happens without any daytime
influence.