Dream about death by train draws attention to your efforts in achieving your goals, ambitions and material gains. You need to show more restraint in some situation. You are afraid of not fitting in. The dream is an evidence for the need to hold some situation or relationship together. You are looking or searching for acceptance.
Death by train dream denotes purification. You are stretching yourself too thin, either financially, physically, emotionally or time-wise. You may be trying to prevent something from being said or revealed. The dream is sometimes wealth or dignity. Perhaps you need to bring the same sense of adventure into your existing relationship.
If you dreamt about death by train:
Sometimes it is the difficulties that occur within relationships that later usher in a greater understanding and depth of communication between two people. Right now may unacknowledged feelings that have been causing unnecessary tension between you and your partner (current or prospective) are likely to surface. If you can work through these with a spirit of trust, then you may find your relationship considerably strengthened.