the highest point of something; apex; summit; top

the vertex of a mountain.

Anatomy, Zoology . the crown or top of the head.

Craniometry . the highest point on the midsagittal plane of the skull or head viewed from the left side when the skull or head is in the Frankfurt horizontal.

Astronomy . a point in the celestial sphere toward which or from which the common motion of a group of stars is directed.

Geometry .

the point farthest from the base

the vertex of a cone or of a pyramid.

a point in a geometrical solid common to three or more sides.

the intersection of two sides of a plane figure.

noun

bottom , nadir

noun

acme , apex , apogee , cap , cope , crest , crown , culmination , extremity , fastigium , height , peak , pinnacle , roof , summit , tip , upper extremity , zenith , top , node , point