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Binary opposition, a pair of related terms that are opposite in meaning •
Opposition (boolean algebra), two terms with a shared literal, one positive, the other negative •
Opposition (chess), the position of the kings relative to each other •
Opposition (astronomy), the position of a celestial body •
Opposition (astrology), astrological aspect in horoscopic astrology •
Opposition proceeding, an administrative process available under some patent or trademark laws •
Opposition of the thumb, the location of the thumb opposite to the fingers so that the hand can grasp objects •
Square of opposition, a type of logic diagram ==See also==