1.
established theory, accepted view, prevailing opinion
A theory or view that is widely accepted as correct or standard within a field. Often used when discussing whether something has become the consensus or when challenging conventional wisdom.
それは定説になっている。
That has become the accepted view.
定説を覆す発見があった。
There was a discovery that overturned the established theory.
長年の定説に疑問を投げかける研究者が現れた。
A researcher appeared who cast doubt on the long-held established theory.
USAGE:
Often appears in patterns like 定説になる (become the accepted view), 定説を覆す (overturn the established theory), and 定説とされる (be considered the established theory). Common in academic, scientific, and historical discussions.
COMMON COLLOCATIONS:
- 定説を覆す: overturn the established theory
- 定説になる: become the accepted view
- 定説に反する: go against the accepted view
- 通説: commonly accepted theory (near synonym)