A sigil is a sign drawn to hold an intention in a single shape. Dream books read it as a private wish or resolve given form — something you want but have not yet said aloud.
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.