The document discusses referential semantics, which connects words, objects, and concepts through a semantic triangle consisting of the word (sign), the concept (meaning), and the referent (actual thing). It explains how nouns and verbs relate to real-world entities and actions, and how a sentence refers to real-world situations, emphasizing the importance of general meanings and semantic frames. Examples, such as the words 'unicorn' and 'horse,' illustrate these concepts.