2. (noun)upset, derangement, overthrow 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"
3. (verb)overthrow, subvert, overturn, bring down cause the downfall of; of rulers
"The Czar was overthrown"; "subvert the ruling class"
4. (verb)overrule, overturn, override, overthrow, reverse rule against
"The Republicans were overruled when the House voted on the bill"