The past, what you have chosen to or want to forget —left behind; what one is unaware of, as talk behind one’s back, what has been learnt or dealt with. People behind dreamer: taking the lead in relationships, being decisive. Idioms: behind the scenes, behind the time; fall behind; put something behind me.
See Buttocks and Back.
1- To be behind someone in a dream indicates that on a subconscious level we may consider ourselves to be inferior in some way.
2- We may find we have a fear of being left behind.
3- We should look at our spiritual standing as we may, quite literally; be behind in our search for wholeness.