To topple over or be overturned; to capsize or be turned upside down (intransitive).
強風で自転車が覆った。
A bicycle was blown over by the strong wind.
ボートが波に飲まれて覆った。
The boat was swallowed by the waves and capsized.
本棚が地震で覆ったが、誰もけがはなかった。
The bookshelf toppled in the earthquake, but nobody was injured.
To be overruled, reversed, or discredited (a decision, judgment, theory, etc. is overturned).
高裁の判決が覆り、無罪となった。
The appellate court's decision was overturned, and he was acquitted.
長年の説が新しい研究で覆された。
A long-held theory was overturned by new research.
その証拠が出てきて、議論の根拠が覆った。
With that evidence emerging, the basis of the argument was discredited.