Spiritual Meaning:
Night symbolizes the intense darkness that occurs before rebirth or initiation. There is a disintegration, which has to occur before there can be any possibility of enlightenment. Night can also signify death or drastic change.

Psychological / Emotional Perspective:
Physiologically, night is a time when the body is supposed to be renewing itself. Dreams at different times of the night may highlight emotions formerly associated with various organs.

Everyday Material Aspects:
Night signifies a period of rest and relaxation, both in dreams and in ordinary life. It can, however, also suggest a time of chaos and difficulty. More positively, it is a period that allows us to create a new beginning with the dawning of the new day. Used constructively, night is, therefore, the fallow period before fresh growth.

Also consult also the entries for Dawn / Day and Night and Time.