1. [noun] A point; the sharp end or top of anything that terminates in a point; as, the peak, or front, of a cap.
2. [noun] The highest value reached by some quantity in a time period.
3. [noun] (geography) The top, or one of the tops, of a hill, mountain, or range, ending in a point; often, the whole hill or mountain, especially when isolated; as, the Peak of Teneriffe.
4. [noun] (nautical) The upper aftermost corner of a fore-and-aft sail; -- used in many combinations; as, peak-halyards, peak-brails, etc.
5. [noun] (nautical) The narrow part of a vessel's bow, or the hold within it.
6. [noun] (nautical) The extremity of an anchor fluke; the bill.
7. [noun] (mathematics) A local maximum of a function, e.g. for sine waves, each point at which the value of y is at its maximum.
8. [verb] To reach a highest degree or maximum.
9. [verb] To rise or extend into a peak or point; to form, or appear as, a peak.
10. [verb] (intransitive) To become sick or wan.
11. [verb] (intransitive) To acquire sharpness of figure or features; hence, to look thin or sickly.
12. [verb] (intransitive) To pry; to peep slyly.
13. [verb] Misspelling of pique.
14. [noun] The most extreme possible amount or value; 'voltage peak'.
15. [noun] The period of greatest prosperity or productivity.
16. [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'.
17. [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'.
18. [noun] A V shape; 'the cannibal's teeth were filed to sharp points'.
19. [noun] The highest point (of something); 'at the peak of the pyramid'.
20. [noun] A brim that projects to the front to shade the eyes; 'he pulled down the bill of his cap and trudged ahead'.
21. [verb] 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'.
