Ironing is read as smoothing out creases — tidying a situation or trying to look composed. Dream books also see it as care for appearances and the wish to get things just right.
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.