o ‧ ver ‧ turn /ˌəʊvəˈtɜːn $ ˌoʊvərˈtɜːrn/ BrE AmE verb
[ Word Family: noun : ↑ turn , ↑ upturn , ↑ turning ; verb : ↑ turn , ↑ overturn ; adjective : ↑ upturned ]
1 . [intransitive and transitive] if you overturn something, or if it overturns, it turns upside down or falls over on its side:
Leslie jumped to her feet, overturning her chair.
His car overturned, trapping him inside.
2 . overturn a decision/verdict etc to change a decision or result so that it becomes the opposite of what it was before:
His conviction was overturned by the Court of Appeal.
3 . [transitive] to suddenly remove a government from power, especially by using violence SYN overthrow