A derelict building or person signifies a lack of hope, a 'lost sheep'. Since hope and faith are two prime motivators, anything that appears derelict suggests that we have lost the ability to move away from difficult circumstances. When the energy has gone from a project or, for instance, a relationship, and it has lost focus, we may dream of dereliction. This is when there is no hope of re-energizing the project or relationship. Also consult the entry for Demolition.