International Feng Shui Guild Glossary

Yin 陰 寅 , also called Tiger 虎
1. The passive polarity of the yin/yang. Yin symbolizes darkness, stillness, flexibility, weakness, Earth and the feminine. Yin qi, or energy, must be balanced in all situations by an appropriate presence of yang energy. See definition of combined term yin/yang.
2. The third earthly branch in the cycle of twelve life energies, representative of the energies of moving ahead rapidly. It is used in Chinese Astrology and Four Pillars Astrology. - See Earthly Branches, Zodiac, Asian

Yin chai Zhe 陰宅
Translated as “dark house,” meaning tomb or grave site.

Yin House Feng Shui
The Feng Shui study of houses for the dead (burial sites). Many ancient rulers believed that burial on land with nourishing energy brought prosperity to their dynasty.

Yin/yang 陰陽
A concept from the I Ching denoting the opposite polarities that came into being when the universe came into manifestation; the Taoist idea that unites all opposites as complimentary inseparable forces.
Yin, Yang