UFO
Carl Jung believed that UFOs are a symbol, akin to the reappearance of Christ, representing hope in an age of technology. They take on an almost religious dimension as circular mandala symbols representing the higer self. Jung wrote that the worldwide stories of the UFOs are "a symptom of a universally present psychic disposition." The unconscious can manifest itself everywhere and crosses social divides. In dreams, UFOs may represent your desire to find the true spiritual purpose of life and the wholeness of slef.
Mystical Meaning - Why did the ancient dream seers give no interpretation for this dream? Perhaps the knowledge is hidden away somewhere in the ancient X Files?

Ugly
An ugly person appearing in a dream may represent an aspect of yourself that frightens or repulses you. You may have represses or rejected feelings that may be beneficial to your psychological wholeness.
Mystical Meaning - The fairy tale The Beauty and the Beast illustrates that you should not judge things by their appearance. Similarly, what may at first appear to be a frightening aspect of your self may in reality mask the true self and its inner beauty.

Umbrella
In dreams umbrellas usually symbolize the device that the conscious mind uses to protect itself from the unconscious. Umbrellas might symbolize our unwillingness to deal with negative emotions, psychological baggage, or trauma. If the umbrella is opened, you may be protecting yourself from unconscious materials. If the umbrella is closed, then you may be prepared and be willing to deal with the unfamiliar psyche. Old dream interpretations say that the umbrella is the symbol of security. If the umbrella is broken or turned inside out, your ultimate achievement is possible but delayed.
Mystical Meaning - To dream that you have lost an umbrella is fortunate. It predicts a valuable present from a relation. However, if you dream of finding one, you will experience a severe loss in business.

Underground
The underground usually symbolizes the unconscious. Things that are uncovered, dug up, or that emerge from the ground represent qualities that are coming from the unconscious. If it is a repressed material, these images may be frightening and may appear as zombies, rats, or monsters. If you dream of exploring caves or mines, it may show that you are discovering the innermost recesses of the unconscious.

Unicorn
In mythology, unicorns are either white or multi-colored. They unite the spectrum, showing that the one is the essence of the many. They are the mythical embodiment of the inner realm of the imagination. They may also represent power, gentility, and purity. Your dream may be an expression of inspiration and wonder at the marvels of the inner world.
Mystical Meaning - Dream oracles say that this dream means you will have some correspondence in connection with official affairs.

Uniform
Seeing yourself wearing a uniform in a dream suggests that you have identified with a larger group, a movement, or an organization that requires you to conform and carry out its ideology. This may be positive or negative depending on the associations made and the kind of uniform that you are wearing. The issues expressed in this dream might be about self-identity, conformity, or responsibility (duty). The unconscious is pointing to the possibility that your individuality has been covered up and is being unnoticed because you are functioning as a member of a group and not as an individual.
Mystical Meaning - Superstition says that this dream indicates that you will make a journey full of adventure and of special interest to you regarding matrimonial matters.

Uranus (Ouranos)
In mythology, Uranus is the sky-god and the personification of Heaven. He represents the undifferentiated and limitless potential for growth and is symbolic of evolution. The planet Uranus was discovered in 1781. Astrologically, it represents cosmic power that causes creation, progress, sudden changes and, at times, upheavals and interference. Seeing the planet Uranus in your dream may represent unexplored possibilities and potential. It may be an unconscious encouragement to create change and to progress. If life appears to be a bit out of control and if many unsettling changes are occurring, Uranus in a dream may be a positive sign from the unconscious. It suggests that turmoil can be used to create new possibilities and that in the end things will be better off then when they began.

Urination
Releasing bodily wastes in a dream suggests a need to release repressed emotions and/or anxiety. At times urination may have sexual connotations. Many people dream about the need to urinate which wakes them up and then they realize that they need to use the bathroom. At times the dream triggers the physical sensation and other times the physical sensation may become a part of the dream.
Mysitcal Meaning - Urine has for centuries been regarded as a protection against ghosts and evil spirits. Alsi it was believed that if a girl urinates in a man's shoes he will fall madly in love with her. Clearly, these concepts are of great significance when interpresting your dream.