peak

noun

1.
the most extreme possible amount or value
extremum
Derived from:
peak peaky
2.
3.
the highest level or degree attainable; the highest stage of development
hightip noontime acme elevation height meridian pinnacle summit superlative tiptop top
Derived from:
peak
4.
the top or extreme point of something (usually a mountain or hill)
hillhead ris yop crest crown summit tip top
5.
a V shape
point tip
6.
the highest point (of something)
highwater mark acme apex vertex
7.
a brim that projects to the front to shade the eyes
bill eyeshade visor vizor