pinnacle pinnacle /ˈpɪnəkəl/

noun

1. () (architecture) a slender upright spire at the top of a buttress of tower  ( pinnacle )
   (architecture) a slender upright spire at the top of a buttress of tower
    The church's pinnacle stood tall, pointing towards the heavens.
   The church's pinnacle stood tall, pointing towards the heavens.
   
   
2. A lofty peak  ( pinnacle )
   a lofty peak
    The mountaineers aimed to reach the pinnacle by noon.
   The mountaineers aimed to reach the pinnacle by noon.
   
   
3. The highest level or degree attainable; the highest stage of development  ( acme , meridian , pinnacle , elevation , peak , summit , superlative , tiptop , top , height )
   the highest level or degree attainable; the highest stage of development
    His landscapes were deemed the acme of beauty
   his landscapes were deemed the acme of beauty
    The artist's gifts are at their acme
   the artist's gifts are at their acme
    At the height of her career
   at the height of her career
    The peak of perfection
   the peak of perfection
    Summer was at its peak
   summer was at its peak
    ...catapulted Einstein to the pinnacle of fame
   ...catapulted Einstein to the pinnacle of fame
    The summit of his ambition
   the summit of his ambition
    So many highest superlatives achieved by man
   so many highest superlatives achieved by man
    At the top of his profession
   at the top of his profession
   

verb

1. Raise on or as if on a pinnacle  ( pinnacle )
   raise on or as if on a pinnacle
    He did not want to be pinnacled
   He did not want to be pinnacled
   
2. Surmount with a pinnacle  ( pinnacle )
   surmount with a pinnacle
    Pinnacle a pediment
   pinnacle a pediment