What does the term "tacit" refer to in terms of communication?

The term "tacit" specifically refers to something that is understood or implied without being directly stated. In the context of communication, it signifies an understanding or agreement that exists without the need for explicit articulation. This often includes non-verbal cues, unspoken feelings, or assumptions that are generally accepted within a certain context or among certain individuals.

In contrast, the other choices denote forms of communication that involve either clarity and explicitness, unintentionality, or excessive complexity. Therefore, "implied, not stated outright" is the essence of what "tacit" conveys, emphasizing an underlying understanding rather than a straightforward declaration.