What does it mean when you have a dream reuniting with your past lover?

This probably means that something in the past day or so brought memories of that old love to your mind. It need not have been anything you noticed, but could have been a subtle piece of music, a place you passed by or even a fragrance associated with that person. The dream could even have been triggered by the holiday season that is just beginning, bringing to mind previous holidays spent with that old love.