Palm fronds were waved to welcome victors and carried in processions, so they stand for triumph, celebration and peace. They are also linked to shade and rest.
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.