American English

Definition of overturn verb from the Oxford Advanced American Dictionary



    Verb Forms present simple I / you / we / they overturn
    he / she / it overturns
    past simple overturned
    -ing form overturning
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  1. 1[intransitive, transitive] if something overturns, or if someone overturns it, it turns upside down or on its side The car skidded and overturned. overturn something He stood up quickly, overturning his chair.
  2. 2[transitive] overturn something to officially decide that a legal decision etc. is not correct, and to make it no longer valid to overturn a decision/conviction/verdict His sentence was overturned by the appeals court.
See the Oxford Advanced Learner's Dictionary entry: overturn