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overturn

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verb American English pronunciation: overturn /ˌoʊvərˈtɜrn/ 
Word Forms
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present tense
I/you/we/theyoverturn
he/she/itoverturns
present participleoverturning
past tenseoverturned
past participleoverturned
  1. 1
    [transitive] to turn something so that its bottom or side is upward

    The dogs have overturned our trash cans again.

    1. a.
      [intransitive] to turn over in this way

      The truck overturned and fell off the bridge.

  2. 2
    [transitive] to say officially that something such as a decision or law is wrong and change it

    The appeal court refused to overturn the lower court's decision.

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