The pronghorn is built for speed over open plains, so it is read as quickness, freedom and running your own race. It also stands for staying ahead of a threat that is no longer there.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.