Dream about big white horse indicates minor obstacles that you must overcome. Not to try to do everything yourself. A plan has gone south or gone awry. Your dream is a hint for feelings of abandonment and unworthiness. You are unable to communicate your point across.
Big white horse dream is something in your life which you have left hanging or unfinished. You are not facing reality. You are holding on to too much and need to learn to let go. Your dream is sadly a warning signal for someone who is not as bad as you had assumed. You need to step away from a situation that will harm you.
If you dreamt about big white horse:
You may find yourself gravitating toward solid, grounded things, in hopes that these will provide you with the stability that you lack. A key word for you today is patience. Learn how to wait without becoming restless or grumpy. What you will discover after a while is that the stability you seek is actually sitting right there inside of you, and has been all along.