intension the meaning or connotation of an expression, as opposed to its extension or denotation, which consists of those things signified by the expression. The intension of a declarative sentence is often taken to be a proposition and the intension of a predicate expression (common noun, adjective) is often taken to be a concept. For Frege, a predicate expression refers to a concept and the intension or Sinn (‘sense’) of a predicate expression is a mode of presentation distinct from the concept. Objects like propositions or concepts that can be the intension of terms are called intensional objects. (Note that ‘intensional’ is not the same word as ‘intentional’, although the two are related.) The extension of a declarative sentence is often taken to be a state of affairs and that of a predicate expression to be the set of objects that fall under the concept which is the intension of the term. Extension is not the same as reference. For example, the term ‘red’ may be said to refer to the property redness but to have as its extension the set of all red things. Alternatively properties and relations are sometimes taken to be intensional objects, but the property redness is never taken to be part of the extension of the adjective ‘red’. See also EXTENSIONALISM , INTENSION — ALITY , INTENSIONAL LOGIC , MEANIN. D.N.