The term 'unwritten meaning' can be defined as the underlying message or meaning that is not explicitly stated. This concept is often referred to as subtext, which is a seven letter word that can be used to describe this idea. Subtext is an important part of communication, as it allows people to convey their thoughts and feelings without having to explicitly state them. It is often used in literature, film, and other forms of media to add depth and complexity to the story.