A hundred is read as fullness — a century, a perfect score, a whole made of many parts. In a dream it suggests the wish to give everything, or the sense of having done so.
Does the traditional reading fit your dream, or did it mean something else to you?
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.