Darkness
What has not yet been brought into awareness — sometimes restful, sometimes hidden.
Darkness in a dream is the dictionary's image of what has not yet been brought into awareness. Darkness in a familiar place is the dream's gentle image of rest. Darkness in a place that should be lit is the dictionary's image of a part of life that has stopped being looked at.
Where you often see it. Walking into a familiar room with the lights off. A landscape gone dark in mid-day. The hour just before the dream resolves. The dictionary reads darkness as material the dreamer has not yet brought into awareness — sometimes restful, sometimes hidden.
What it is not. Darkness is not a threat by default. Reading darkness as evil is folk overlay; the dictionary treats it as not-yet-illuminated.
Related in the dictionary. Read darkness with black, night-time contexts of any symbol, and silence. A lit candle inside a dark dream is the dictionary's image of the small attention that begins to reveal.