To dream of an abyss represents a situation that feels endless or pointless. You may feel that a potential consequence will last forever or never allow you to do what you want again. You may be experiencing a crisis or critical situation.
Alternatively, dreaming about an abyss may reflect feelings about the emptiness or eternal nature of death.
Example: A woman dreamed that she had only a few moments left to safely place a child on the ground before she feel into an abyss. In waking life she was to be sentenced to death the next night for resisting the Nazi’s. When asked what she thought the child represented she said it represented the idea of her resistance which would triumph despite all obstacles.