Definition of "opposite"

opposite

/ˈɒpəzɪt/

adjective
not comparable
1. Located directly across from something else, or from each other.
2. (botany) Of leaves and flowers, positioned directly across from each other on a stem.
3. Facing in the other direction.
4. Of either of two complementary or mutually exclusive things.
5. Extremely different; inconsistent; contrary; repugnant; antagonistic.
  Quotations
  Novels, by which the reader is misled into another sort of pieasure opposite to that which is designed in an epick poem.
  1697, Virgil, “Dedication”, in John Dryden, transl., The Works of Virgil: Containing His Pastorals, Georgics, and Æneis. […], London: […] Jacob Tonson, […]
  Particles of speech have divers, and sometimes almost opposite, significations.
  1689 (indicated as 1690), [John Locke], An Essay Concerning Humane Understanding. […], London: […] Eliz[abeth] Holt, for Thomas Basset, […]
noun
plural opposites
1. Something opposite or contrary to something else.
2. A person or thing that is entirely different from or the reverse of someone or something else; used to show contrast between two people or two things.
3. An opponent.
4. An antonym.
5. (mathematics) An additive inverse.
adverb
not comparable
1. In an opposite position.
preposition
1. Facing, or across from.
  Quotations
  It was April 22, 1831, and a young man was walking down Whitehall in the direction of Parliament Street. […]. He halted opposite the Privy Gardens, and, with his face turned skywards, listened until the sound of the Tower guns smote again on the ear and dispelled his doubts.
  1906, Stanley J[ohn] Weyman, chapter I, in Chippinge Borough, New York, N.Y.: McClure, Phillips & Co., page 01
2. In a complementary role to.
3. (television) On another channel at the same time.