What does this dream mean?

I had a dream where there were all these people standing side by side and they all were ghosts, a couple of them were people in my life that had passed on and the others were people I knew who are still alive. they were moving up and down appearing and then disappearing their faces were clear but their bodies were a mass of white, like some how they were joined but they were random, no connection with each other, eg one was a cousin, one a friend, one I knew from school. The expression on their faces was the same like they were shocked, mouth open in a "O" and eyes wide they were moving toward me in one sweeping motion like they were coming to get me. what could this dream have been about? what does it mean?