The word liminal comes from the Latin word līmen, meaning “a threshold.” The word threshold has several definitions. It can be the sill of a doorway or the entrance of a building. Ultimately, it means any place of point of entering or beginning. In psychology the term limen means the point at which a stimulus is of sufficient intensity to begin to produce an effect.
Liminal time therefore, is that moment when something changes from one state to another. Examples would be dawn, when the morning sun rises high enough in the sky to bring daylight. Another is dusk, when the evening sun sinks into the horizon bringing nightfall.
Another is that moment when we move from a clearing into a deep fog which shrouds us in mist and for a moment, we stop all thinking. There is that moment when we first wake from a deep sleep, not fully awake but no longer asleep. Plus there is that state when we move from wakeful consciousness into sleep. There are also those moments of transitions between life and death and from an unborn fetus to a living, breathing infant.Read More Here