Not being able to open a locker signifies a failure to reach a private trust. The root of the word suggests a place of containment, and the dream points to a blockage in the retrieval of what has been held in confidence. This dream is not a sign of external theft, but a report on an internal inability to reach a secured part of the self.
The dream marks a moment where a vital resource remains out of reach. The struggle to gain entry reveals a barrier to a truth that is already possessed. A private confidence remains a closed thing.
For its more general meaning: Dream about a locker
Had to find an available locker at school. Hard to find. At last minute found one right next to my class
Dear Reader,
Your dream is an evidence for responsibilities, mentality and problems. This dream signals it is time to acknowledge your responsibilities. Too much mental activity is being expended towards a task at hand. You have a handle over the problems in your life.