Out-of-body experience (OBE), lucid dreaming (LD), astral projection – a number of terms united by lucid dreaming that refer to the state in which a person, while being fully conscious, realizes consciousness outside the normal range of physical perception.
Indirect techniques – entry into lucid dreaming within five minutes of awakening from sleep of any duration – provided there has been minimal physical movement.
Direct techniques – entry into lucid dreaming without any prior sleep, after excessive physical movement upon awakening, or having been awake for at least five minutes.
Dream consciousness – entry into lucid dreaming through becoming consciously aware while a dream episode is happening.
Cycles of indirect techniques – the easiest way to enter lucid dreaming, employed by rapidly alternating certain techniques upon awakening from sleep until one of them works.
Dissociation – separation; in this case, a scientific term describing experiences in lucid dreaming.
Sleep paralysis – a stupor; the complete immobilization that often occurs when falling asleep, awakening, and entering or exiting lucid dreaming.
Stencil – the real physical body that is no longer perceived while in lucid dreaming.
Deepening lucid dreaming – methods for making lucid dreaming as realistic as possible by stabilizing the surrounding space.
Maintaining lucid dreaming – methods for maintaining lucid dreaming state by preventing a lapse into sleep, a return to reality, or an imagined return to reality.
REM – rapid eye movement sleep (REM lucid dreaming); a sleep lucid dreaming characterized by increased brain activity that is accompanied by rapid eye movement and dreaming.
SOBT – School of Our-of-Body Travel.
Foul – an inadvertent termination of lucid dreaming through a spontaneous return to everyday reality.
FFA – forced falling asleep.