A distinction, introduced by Gottlob Frege, between the descriptive or intelligible content of a term, i.e., its sense (Sinn), and the things in reality that it is supposed to indicate, i.e., its reference (Bedeutung). The sense of “triangle,” for example, would be “three-sided figure,” and its reference would be any triangle in reality. Depending on how one understands it, the distinction could be regarded as identical with the standard distinction in logic between the intension and extension of a term.  More specifically, however, this distinction is related to the classical logical distinction between signification and suppositio.