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English definition of “pinnacle”

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pinnacle

noun uk   /ˈpɪn.ə.kl̩/ us  

pinnacle noun (SUCCESS)

[C usually singular] the most successful or admired part of a system or achievement: By the age of 32 she had reached the pinnacle of her career.

pinnacle noun (TOP)

[C] a small pointed tower on top of a building, or the top part of a mountain: literary The pinnacles of the Himalayas were visible above the clouds.
(Definition of pinnacle from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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