American English

Definition of pinnacle noun from the Oxford Advanced American Dictionary

     

    pinnacle

     noun
    noun
    NAmE//ˈpɪnəkl//
     
     
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  1. 1[usually singular] pinnacle of something the most important or successful part of something the pinnacle of her career He spent more than twenty years at the pinnacle of his profession. Formula One is the pinnacle of motor racing.
  2. 2a small, pointed, stone decoration built on the roof of a building We could just make out the pinnacles of the cathedral in the distance.
  3. 3a high pointed piece of rock, especially at the top of a mountain
See the Oxford Advanced Learner's Dictionary entry: pinnacle