A folding chair is a temporary seat, so it is read as a place you hold only for now — at an event, a job or in someone’s life. It can stand for a sense of being an extra rather than a fixture.
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.