Spiritual Meaning:
Mourning expresses grief, a coming to terms with loss. In the spiritual sense we may believe in life after death but we still no longer have the physical presence of the individual.

Psychological / Emotional Perspective:
In many cultures less emotionally repressed than our own, the period of mourning is seen as a way of assisting the departing soul on its way. In dreams we may find that we are helping ourselves to create a new beginning through our mourning for the old. Psychologically, we need a period of adjustment when we have lost something (for instance when a relationship ends) and need to grieve for ourselves as much as for what we have lost.

Everyday Material Aspects:
The process of mourning is an important one in all sorts of ways. We not only mourn death but also the end of a relationship or a particular part of our lives. Since sometimes mourning or grieving is seen as inappropriate in waking life, it will often appear in dreams as a form of relief or release.

You might also like to consult the entries for Death, Funeral, Weeping and Wake.