An untold story or secret refers to one that hasn't been shared or revealed yet. This can include something not spoken about or written down.
When people say "untold" they usually mean a hidden truth, an unshared experience, or a secret that's only known by a few. For example, if someone says "I have some untold stories from my childhood," it means there are things that haven't been told yet because they were too embarrassing or personal to share. It can also be used for something not recorded or documented, like an untold history of a particular place or event.
Not told; not related; not revealed; secret.
