A high chair is read as dependence, nurture and the early stages of growing up. Dream books link it to care given or received, and to a new responsibility.
Where in your waking life have you met something like this lately?
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.