A cap signifies nobility and freedom. The jester’s cap was said to be a parody of the king’s crown demonstrating how transient power really is.
Psychological / Emotional Perspective:
The cap shows the need for respect for a person’s beliefs and wisdom or knowledge.
Everyday Material Aspects:
The cap has the same significance as the hat in dreams and draws attention to status or spiritual powers. If we are wearing a cap in a dream, we may be covering up our creative abilities.
Consult the entries for Hat in Clothes and Joke / Joker.