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a. Of or relating to the ancient Greeks and Romans, especially their art, architecture, and literature.
b. Conforming to the artistic and literary models of ancient Greece and Rome.
c. Versed in the classics: a classical scholar.
2. Music
a. Of or relating to European music during the latter half of the 18th and the early 19th centuries.
b. Of or relating to music in the educated European tradition, such as symphony and opera, as opposed to popular or folk music.
3. Of, relating to, or being a variety of a language that is epitomized by a prestigious body of literature.
a. Standard and traditional: classical methods of navigation.
b. Relating to or being a school of thought or field of study that is established and widely accepted before others: classical economics.
5. Of or relating to physics that can be described without the use of quantum mechanics or relativity.
6. Relating to or consisting of studies in the humanities and general sciences: a classical curriculum.

clas′si·cal′i·ty (-kăl′ĭ-tē), clas′si·cal·ness n.
clas′si·cal·ly adv.
References in classic literature ?
She has a fine face--originally of a character that would be rather called very pretty than handsome, but improved into classicality by the acquired expression of her fashionable state.
A solid can be specifically described and phonons given as excitations of the localized cores along particular many body diagonals and are eigenstate-like despite the ultimately transient nature of the classicality on which their description depends [4].
First, if we accept deoherence to classicality FAPP, then decoherence is entirely an acausal loss of phase information from the open quantum system to the universe.
Putti, garlands, festoons, panels and vases were used as architectural coverings or for cabinetry, with decorations in stylised floral, with geometric compositions, elaborations inspired by classicality, by Klimt or oriental themes.
ZUREK, Preferred states, predictability, classicality and the environment-induced decoherence, "Progress of Theoretical Physics" 89/2 (1993) 281-302; W.