Being adrift stands for having no clear direction and being carried by currents. It is read as uncertainty and loss of purpose, and sometimes as a calm surrender while waiting for land.
When this appeared in your dream, what were you feeling?
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.