/ˈtɒpl ||; ˈtɑpḷ/verb1 [I] topple (over) to become less steady and fall down 不稳而倒下: Don't add another book to the pile or it will topple over. 别再往那堆书上放书，否则会倒下。
2 [T] to cause a leader of a country, etc to lose his/her position of power or authority 使（国家等的领导人）下台；打倒；推翻