Dream about spider killing another spider refers to feelings of being eating alive by work, a relationship or a situation in your life. There is some situation that you are not confronting. A person disappointed you or this person suddenly fell ill. The dream is a signal for some minor disputes. You are feeling withdrawn or overly judgmental.
Spider killing another spider dream is unfortunately complications in your life. You are overbearing, rebellious and unwilling to cooperate with others. You are lacking your own identity. It is a harbinger for a skill that you may have ignored or forgotten. You need to slow down and take things down a notch.
If you dreamt about spider killing another spider:
Although you are endlessly curious about your sweetest love, you are also quite critical at times, and this blend of needing to know, then picking apart what you manage to find out may not be the best way to conduct your relationship right now. It is better to drop your attack mode.