somersault - definition and synonyms

noun [countable] 

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/ˈsʌmə(r)ˌsɔːlt/
singularsomersault
pluralsomersaults
  1. 1
    a movement in which you form your body into a ball and roll forwards or backwards on the ground
    1. a.
      a somersault performed in the air, for example when diving into water
  2. 2
    a sudden change from one policy or opinion to another very different one