Apex vs. Zenith

Apexnoun

The "highest" or the greatest point of something.

Apexnoun

(figuratively) The moment of greatest success, expansion, etc.

Apexnoun

(geometry) The topmost vertex of a cone or pyramid (in their conventional orientation).

Apexnoun

The "pointed" fine end of something.

Apexnoun

The lowest part of the human heart.

Apexnoun

The deepest part of a tooth's root.

Apexnoun

(botany) The end of a leaf, petal or similar organ opposed to the end where it is attached to its support; the tip.

Apexnoun

(astronomy) The point on the celestial sphere toward which the sun appears to move relative to nearby stars.

Apexnoun

(physics) The lowest point on a pendant drop of a liquid.

Apexnoun

The end or edge of a vein nearest the surface.

Apexnoun

(typography) A diacritic in Classical Latin that resembles and gave rise to the acute.

Apexnoun

(typography) A diacritic in Middle Vietnamese that indicates /ŋ͡m/.

Apexnoun

The tip, top, point, or angular summit of anything; as, the apex of a mountain, spire, or cone; the apex, or tip, of a leaf.

Apexnoun

The end or edge of a vein nearest the surface.

Apexnoun

the highest point (of something);

Apexnoun

the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars

Apexnoun

a system of reduced fares for scheduled airline flights and railway journeys which must be booked and paid for before a certain period in advance of departure

Apexverb

reach a high point or climax

Apexverb

turn (a corner) very close to the edge of the track

Zenithnoun

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

Zenithnoun

(astronomy) The highest point in the sky reached by a celestial body.

Zenithnoun

(by extension) Highest point or state; peak.

Zenithnoun

That point in the visible celestial hemisphere which is vertical to the spectator; the point of the heavens directly overhead; - opposed to nadir.

Zenithnoun

hence, figuratively, the point of culmination; the greatest height; the height of success or prosperity.

Zenithnoun

the point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected

Zenithnoun

the time at which something is most powerful or successful

Zenithnoun

the point in the sky or celestial sphere directly above an observer.

Zenithnoun

the highest point reached by a given celestial object

Zenith

The zenith is an imaginary point directly a particular location, on the imaginary celestial sphere. means in the vertical direction (plumb line) opposite to the gravity direction at that location (nadir).