• the most extreme possible amount or value

  "voltage peak"

  同义词： extremum

• the period of greatest prosperity or productivity

  同义词： flower prime heyday bloom blossom efflorescence flush

• the highest level or degree attainable; the highest stage of development

  "the peak of perfection"; " summer was at its peak"

  同义词： acme height elevation pinnacle summit superlative meridian tiptop top

• the top point of a mountain or hill

  "the view from the peak was magnificent"

  同义词： crown crest top tip summit

• a V shape

  同义词： point tip

• the highest point (of something)

  "at the peak of the pyramid"

  同义词： vertex apex acme

• a brim that projects to the front to shade the eyes

  同义词： bill eyeshade visor vizor

"That wild, speculative spirit peaked in 1929"

"at peak hours the streets traffic is unbelievable"