A state of not being physically aware; not conscious. There are two states of physical unconsciousness: sleep and injury.
If unconsciousness occurs due to an injury, the soul is forced out as the normal harmony between body and spirit is interfered with. In sleep, a normal state occurs for the spirit knows that every night the vibrations of the physical body slow down and the spirit prepares itself by visiting the world of spirit.
In greater terms (beyond physical expression), there is no unconsciousness if consciousness is always conscious of itself, its integrity and its state.