the height of anything above a given planetary reference plane, esp. above sea level on earth.

extent or distance upward; height.

Astronomy . the angular distance of a heavenly body above the horizon.

Geometry .

the perpendicular distance from the vertex of a figure to the side opposite the vertex.

the line through the vertex of a figure perpendicular to the base.

Usually, altitudes. a high place or region

mountain altitudes.

high or important position, rank, etc.

noun

depth

noun

apex , distance , elevation , eminence , loftiness , peak , summit , height , acme , ceiling , stature