Traditional ("classical," "authentic") feng shui is a Chinese ethnoscience that addresses the design and layout of cities, villages, dwellings, and buildings. The construction of graves and tombs also includes feng shui, but the rules for dwellings differ from those applied to "yin houses" (houses of the dead). The name Feng Shui literally means "Wind and Water".
Feng Shui - as we nowadays come across the expression - is the art of placement - a guiding philosophy to bring harmony by looking at our environments and how the balance of energies can affect every part of life. All we are and do is connected to the environment, Mother Earth and Chi, the natural Order or Energy which permeates the universe.
Feng Shui is a science incorporating astronomy, geography, the environment, the magnetic fields and physics. Feng Shui is not a religion or superstition - modern science has proven it to be a complex mathematical system.