In many faiths circumcision marks a covenant and belonging, so dream books read it as a rite of passage or a commitment. It can also stand for cutting away something to mark a new beginning.
Does the traditional reading fit your dream, or did it mean something else to you?
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.