Main entry: vertex, acme, apex, peak
Definition: the highest point (of something)
Usage: at the peak of the pyramid
Main entry: meridian, height, tiptop, top, summit, superlative, acme, pinnacle, peak, elevation
Definition: the highest level or degree attainable; the highest stage of development
Usage: 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