1) Acme 2) Apex 3) Apogee 4) Cap 5) Climax 6) Completion 7) Consummation 8) End 9) Ending 10) Finalisation 11) Finalization 12) Graduation 13) Peak 14) Pinnacle 15) Summit 16) Zenith 1) Apogee 2) Celestial mechanic 3) French word used in English 4) Highest point 5) Phase 6) Stage 
• (n.) The attainment of the highest point of altitude reached by a heavently body; passage across the meridian; transit. • (n.) Attainment or arrival at the highest pitch of glory, power, etc.
[Noun] The end or most important part.
The instant at which a celestial object reaches its highest altitude above the horizon as Earth's rotation carries it across the sky; in other words, the moment the object crosses the observer's meridian (the north-south line in the sky). Upper culmination (also known as culmination above pole for c...
The maximum altitude that a celestial object attains above the horizon.
occurs when a heavenly body reaches its maximum altitude above the horizonAn object is said to culminate when it reaches its highest point in the sky. For northern observers, this occurs when the object is due south. For southern observers when it is due North.
Cul'mi·na'tion noun [ Confer French culmination ] 1. The attainment of the highest point of altitude reached by a heavenly body; passage across the meridian; transit. 2. Attainment or arrival at the highest pitch of glory, power, etc. 
In astronomy, culmination is the passing of a star through the meridian, when it has reached the highest point (culmen) of its apparent path in the sky.
The moment when a celestial object crosses the meridian and is thus at its highest above the horizon.
[n] - (astronomy) a heavenly body`s highest celestial point above an observer`s horizon
noun (astronomy) a heavenly body`s highest celestial point above an observer`s horizon
the act or fact of culminating. · that in which anything culminates; the culminating position or stage; highest point; acme. · the position of a celestial body when it is on the meridian.
a concluding action a concluding action a concluding action