(astronomy) The point in the sky vertically above a given position or observer; the point in the celestial sphere opposite the nadir.

Of or pertaining to a zenith. / (cartography, of a projection) azimuthal

plural of zenith

In terms of or by means of the zenith.

(rare) Of, pertaining to, or characteristic of a zenith.

The passing of the sun directly overhead such that no shadows are cast by a pole sticking straight up from the ground. These conditions only occur in locations between the Tropic of Cancer and the Tropic of Capricorn.

plural of zenithal passage

(astronomy) Synonym of zenith telescope

(astronomy) A telescope that can point vertically at the zenith

plural of zenith telescope