If something overturns or if you overturn it, it turns upside down or on its side.
例句
The lorry veered out of control, overturned and smashed into a wall...卡車突然失控，翻倒撞上了一堵墻。Alex jumped up so violently that he overturned his glass of sherry...亞歷克斯一下子暴跳起來，結(jié)果把他那杯雪利酒都打翻了。
VERB
推翻，撤銷（判決）
If someone in authority overturns a legal decision, they officially decide that that decision is incorrect or not valid.
例句
When the Russian parliament overturned his decision, he backed down...俄羅斯議會推翻了他的決定，他只好作罷。His nine-month sentence was overturned by Appeal Court judge Lord Justice Watkins.上訴法院法官沃特金斯撤銷了對他作出的9個月徒刑的判決。
VERB
顛覆，破壞（政府或體系）
To overturn a government or system means to remove it or destroy it.
例句
He accused his opponents of wanting to overturn the government.他指責(zé)反對派企圖顛覆政府。...a society where all the old values had been overturned.摒棄了所有舊價值觀的社會