Not governed by the rules of Newtonian mechanics.(adjective)
Not governed or describable by the classical theory of electromagnetism.(adjective)
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Use "nonclassical" in a sentence
"One could hardly be surprised to encounter random collectivities, whether governed by usual statistical laws (which are quite different from the regularities we encounter in nonclassical cases) or not."
"This decoherence, however, signals the irreducible inaccessibility of the efficacious processes that give rise to the body or the text through certain nonclassical configurations of material or phenomenal effects."
"They give the materiality of the signifiers a formal structure we encounter in nonclassical theory."