Extension (semantics)

In semantics, "extension" refers to the range of objects or entities in the world that a particular term or expression denotes. Specifically, the extension of a term is the set of all things that fall under that term. For example: - The extension of the term "dog" includes all actual dogs in the world. - The extension of the term "even number" includes all even numbers (like -4, 0, 2, 4, etc.).