X-Ray
Dreaming about getting a x-ray or looking at an x-ray may not have anything to do with health matters. This dream suggests that you are ready to look beneath the surface of a current situation or problem. X-rays require focused energy and your dream may be a reflection on the energy that you already possess. This energy will assist you in gaining insight and awareness or help you with problem solving. Old dream interpretation books say that dreaming of x-rays is a dream of the contrary. That is, you will be released from your worries and enjoy good health.
Mystical Meaning - Sadly, no mystical traditions are associated with X-rays, but it is interesting to note that Marie Curie, the discoverer of radium, is said to have been very interested in Spiritualism, mysticism, and dreams.

Yard
In daily life the appearance of a backyard is usually a reflection on the people living in the house. A neat and well groomed yard, with grass and flowers, usually indicates that people living there are conscientious, caring, and have enough energy to maintain their property. The yard in your dream may be a reflection of how well you have been able to maintain your internal and external environment. The backyard points to things that are less obvious and, at times, may be unconscious. It may also represent childhood memories that hold positive and negative emotions and lead to self-awareness. If the yard in your dream was a measuring unit, think about what you are measuring and if any growth has taken place.

Yellow
Depending on the details of the dream, the color yellow could have positive or negative connotations. If the dream has a pleasant or happy mood the yellow could represent enthusiasm, energy, vigor, and harmony. However, if the dream had an undesirable tone, the yellow could represent fear and the inability to make a decision or take action.

Youth
A youth may represent psychological qualities within yourself that have not as yet grown to maturity. This dream may also be about vitality and sexual desire. Or the dream may simply highlight your concerns about getting older.
Mystical Meaning - There will be a reconciliation of family arguments if you dream of seeing a young person. If a mother dreams that her child is young again, she will experience a period of renewed hope and vigor.

Zero
Interpreting numbers that we see in dreams may be difficult. Their meaning my be very personal, such as a reflection of financial concern or any other area of daily life represented by numbers. One way to interpret numbers is to try to see how they are specifically related to you. (E.g. If you have the number 25 in your dream. Your house number is 12 while your parent's number is 13. Together they make 25, and this dream could have been addressing issues in regard to you and your parents.) Generally, if you see a zero as part of a number, interpret it as you would any other number in your dreams. See Numbers. Otherwise, a zero can have the same meaning as a circle. The circle symbolizes infinity, completeness, and wholeness, the circle of life and the eternal unknown. You the dreamer may have come to a greater degree of spiritual awareness and the dream could be spiritual in nature. However, as always, examine all of the details in the dream, as well as its tone and mood, and rule out the possibility of "going in circles" as the primary message in the dream.
Mystical Meaning - Dream lore says that to dream of zero indicates wasted energy. A change of direction is neccessary.

Zodiac
If you dream of your own zodiacal sign, it may represent you. However, other signs represent traits and characteristics associated with the given sign. For example, you may be acting like a determined Aries, a stubborn Taurus, or an eccentric Aquarius. If the whole zodiac wheel is represented, it is a mandala that represents the wholeness of the self, the cosmic you.
Mysical Meaning - Some dream oraculums claim that you will emigrate if you dream about the signs of the zodiac.

Zombie
Dreaming about the living dead may carry a powerful message. If you are "walking around like a zombie," it usually means that you are emotionally disconnected from things going on around you. You may be experiencing unhealthy detachment and are unable to appropriately feel positive or negative emotions. Currently, you may be out of touch and outside of the main flow of life. This dream could positively sever you and help you to become aware of emotional issues and circumstances in daily life that are difficult to face.