'overthrow' definitions:

Definition of 'overthrow'

(from WordNet)
noun
The termination of a ruler or institution (especially by force)
noun
The act of disturbing the mind or body; "his carelessness could have caused an ecological upset"; "she was unprepared for this sudden overthrow of their normal way of living" [syn: upset, derangement, overthrow]
verb
Cause the downfall of; of rulers; "The Czar was overthrown"; "subvert the ruling class" [syn: overthrow, subvert, overturn, bring down]
verb
Rule against; "The Republicans were overruled when the House voted on the bill" [syn: overrule, overturn, override, overthrow, reverse]

Synonyms of 'overthrow'

From: Moby Thesaurus