Usage patterns 〈 事こと 〉 が 定てい 説せつ となる for something to become the established/accepted theory
This theory is now the established view.
定てい 説せつ を 覆くつがえ す to overturn the established theory
The new discovery overturned the previously established theory.
定てい 説せつ によれば according to the established theory
According to the established theory, dinosaurs went extinct due to a meteor impact.
定てい 説せつ を 疑うたが う to question the established theory
He questioned the established theory in the field and continued his own research.
Kanji 定 determine, fix, establish 説 opinion, theory, explanation Related words 通説 is a widely held view that may still be debated, while 定説 refers to a theory accepted as settled fact.
学説 is any academic theory or doctrine regardless of consensus, whereas 定説 specifically denotes one that has become the accepted standard.
Opposites 異説 is a dissenting or alternative theory that challenges the 定説 , the currently accepted view.
定説 is an established, widely accepted theory, in contrast to 仮説 , which is an unproven, tentative idea awaiting verification.
Don't confuse with 仮説 is an unproven hypothesis awaiting testing, while 定説 is a theory already accepted as established, so learners should not mix up the two stages.
伝説 means a legend or folklore tale, quite different from 定説 's meaning of an established scholarly theory, despite the similar-looking 説 ending.
定番 (a staple/classic item) and 定説 (an established theory or accepted view) share the kanji 定 but apply to completely different domains.
Etymology Compound of 定 (てい , 'fixed, established') and 説 (せつ , 'theory, opinion'). The word itself is a Sino-Japanese term (kango) that follows standard kanji composition patterns.
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