WILD stands for Wake Initiated Lucid Dream because the dreamer manages to enter a dream directly from the waking state without any lapse in consciousness. Most believe that this is possible because when the body is motionless for a long period of time, the brain is tricked into thinking that the dreamer has gone to sleep. When that happens the mind disconnects itself from the body in what's known as sleep paralysis. From there the brain enters REM and dreams start to form, allowing the dreamer to go into it directly.
There are many different strategies to consciously entering a dream. This tutorial focuses on the traditional WILD technique in which the dreamer simply remains motionless and waits for the body to fall asleep. Ways to keeping your mind conscious will also be explained here.
The term 'Wake Initiated Lucid Dream' was coined by Dr. Stephen Laberge, however people have been doing it for thousands of years. Famous WILDers included Salvador Dali who spoke of a trance-like state in which he could walk around an imaginary world. Most believe that monks who practice deep mediation occasionally enter dreams this way, some of which may be interpreted as the state of nirvana.
WILD Tutorial Here