Noun acme has 2 senses
  1. acme, height, elevation, peak, pinnacle, summit, superlative, top - the highest level or degree attainable; "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"
    --1 is a kind of degree, level, stage, point
  2. vertex, peak, apex, acme - the highest point (of something); "at the peak of the pyramid"
    --2 is a kind of extreme point, extreme, extremum
    --2 has particulars: crown; roof peak