- 1[intransitive, transitive] to become unsteady and fall down; to make something do this + adv./prep. The pile of books toppled over. He toppled backward into the river. topple somebody/something + adv./prep. He brushed past, toppling her from her stool.
- 2[transitive] topple somebody/something to make someone lose their position of power or authority synonym overthrow a plot to topple the president
NAmE//ˈtɑpl//Verb Forms present simple I / you / we / they topple
he / she / it topples
past simple toppled
-ing form toppling