A guild stands for belonging to a craft and to the people who share it. Dream tradition reads it as mastery passed hand to hand, and as the rules a group asks its members to keep.
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.