peak
n//piːk//topp, spets
A point; the sharp end or top of anything that terminates in a point; as, the peak, or front, of a cap.
(mathematics) A local maximum of a function, e.g. for sine waves, each point at which the value of y is at its maximum.
(geography) The top, or one of the tops, of a hill, mountain, or range, ending in a point.