Three interlaced arcs make the triquetra, used in Celtic art and later as a sign of the Christian Trinity. It is read as the unbreakable link between three things — mind, body and spirit, or past, present and future.
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.