summit
noun.
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
noun.
the top or extreme point of something (usually a mountain or hill)
the view from the peak was magnificent|they clambered to the tip of Monadnock|the region is a few molecules wide at the summit
Synonym: top, tip, peak, crown, crest
noun.
a meeting of heads of governments
verb.
reach the summit (of a mountain)
They breasted the mountain|Many mountaineers go up Mt. Everest but not all summit
Synonym: breast