overturn - noun

the act of upsetting something

an improbable and unexpected victory

overturn - verb

• turn from an upright or normal position
• cause to overturn from an upright or normal position
• rule against
• cause the downfall of; of rulers
• cancel officially
• change radically

overturn - thesaurus

annul   countermand   lift   override   overrule   overthrow   repeal   rescind   reverse   revoke   revolutionise   revolutionize   subvert   turnover   upset   vacate