IPA: /nɒnˈklæsɪkəl/
KK: /nɑnˈklæsɪkəl/
Referring to something that does not follow traditional or established rules or methods, often in contrast to classical approaches.
The nonclassical approach to physics allows for new theories that challenge old beliefs.
Nonclassical → It is formed from "non-" (meaning not) and "classical" (from Latin "classicus", meaning belonging to a class or rank). The word "nonclassical" refers to something that does not belong to the traditional or established class, especially in art, music, or literature.
Think of 'non-' meaning 'not' and 'classical' referring to traditional forms — so nonclassical means something that is not traditional.