Definition of pinnacle
the highest level
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"
with a pinnacle; "pinnacle a pediment"
on or as if on a pinnacle; "He did not want
to be pinnacled"