A chasm in a dream often represents a dangerous situation in life.
You may dream that you are facing a chasm, or abyss, or teetering over the edge of a chasm when you find yourself in a real life situation that requires you to take a risk.
The dream could be telling you that you need to make a decision and take action.
Falling in a chasm can signify a fear of failure.
If you find yourself leaping or driving over a chasm successfully, you are confident that you will be able to overcome whatever obstacles you encounter and achieve your goal.
A dream of falling into a chasm, but then being carried upward by wind, means that you believe that you can succeed with the help of others.
A chasm in a dream can also represent a devouring, overprotective mother figure.