If you forgot your locker combination in your dream, this is your unconscious mind’s way of telling you that you may have forgotten something in real life - like an important date or an appointment.... My Dream Interpretation
To dream that you are in a locker room denotes that you need time alone for relaxation and contemplation. It also means that you are in the process of experiencing some rough times in your waking life. It may also be that you are pursuing a love interest.... Dream Symbols and Analysis
To dream that you are in a locker room, suggests that you need time to cool off and calm down. It also indicates that you are involved in some competition or overcoming an obstacle in your life. Perhaps you are trying to pursue a love interest.
If you dream of being in a locker room of the opposite sex, you must take a more subtle approach if you want to win someone’s heart.
If you are naked or semi-clothed in the locker room, you may be feeling unprepared or unfit for a situation.... My Dream Interpretation
The essence of the meaning of a locker room is the event that is being prepared for or returned from, usually a sporting event or some other physical fitness experience. There is nakedness, and therefore vulnerability is associated with this imagery. Consider whether or not your dream suggests that the locker room as a setting is connected to the before or the after of the implied event.
If before, then you are preparing for some sort of challenge ahead.
If after, then you are coming down off of some measure of exertion or effort. Your own school-age associations with locker rooms should be taken into consideration with your interpretation.... Complete Dictionary of Dreams
A safe when used to protect valuables is a good omen which signifies security in your life while an empty safe in your dreams may mean loss or lack: loss if it has been broken into, or lack if it is simply empty.... Encyclopedia of Dreams