The anchor is an old symbol of stability, hope and holding firm in rough water. It can also be read as being held in place — security on one side, stagnation on the other.
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.