The printing house is traditionally read as making words public and permanent. It stands for spreading ideas, and for the weight of what cannot be unsaid once it is printed.
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.