Once' is a four-letter word that can be used to describe something that happens only one time. It can also be used to refer to a particular moment in time, such as 'ONCE upon a time.' The phrase 'starter story' is often used to refer to a narrative that is used to introduce a larger story or set the scene for a longer tale. It is usually the first part of a story and is used to provide some background information and context for the rest of the story.