pinnacle

Noun

• a lofty peak

• the highest level or degree attainable; the highest stage of development
  • his landscapes were deemed the acme of beauty
    
  • the artist's gifts are at their acme
    
  • at the height of her career
    
  • the peak of perfection
    
  • summer was at its peak
    
  • ...catapulted Einstein to the pinnacle of fame
    
  • the summit of his ambition
    
  • so many highest superlatives achieved by man
    
  • at the top of his profession
    

• (architecture) a slender upright spire at the top of a buttress of tower

Verb

• raise on or as if on a pinnacle
  • He did not want to be pinnacled
    

• surmount with a pinnacle
  • pinnacle a pediment