In critical theory, a binary opposition (also binary system) is a pair of theoretical opposites. In structuralism, it is seen as a fundamental organizer of human philosophy, culture, and language
(Bilgisayar) A close binary system in which each star has filled and expanded well beyond its Roche lobe. The system therefore consists of two stellar cores surrounded by a common, dumbbell-shaped convective envelope. Such a system is often an eclipsing binary of the W Ursae Majoris type. See also Common Envelope Binary