English to English
1. the most extreme possible amount or value
2. the period of greatest prosperity or productivity
3. 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
4. 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
5. a V shape
the cannibal's teeth were filed to sharp points
6. the highest point (of something)
at the peak of the pyramid
7. a brim that projects to the front to shade the eyes
he pulled down the bill of his cap and trudged ahead
8. A point; the sharp end or top of anything that terminates in a point; as, the peak, or front, of a cap.
9. to reach the highest point; attain maximum intensity, activity
That wild, speculative spirit peaked in 1929|Bids for the painting topped out at $50 million
10. To rise or extend into a peak or point; to form, or appear as, a peak.
11. To raise to a position perpendicular, or more nearly so; as, to peak oars, to hold them upright; to peak a gaff or yard, to set it nearer the perpendicular.