Zigzags are read as progress made by tacking back and forth rather than in a straight line. The same shape recalls lightning, so it can also stand for nervous energy or sudden bursts of change.
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.