culmination in WordNet English dictionary

1. a final climactic stage
   "their achievements stand as a culmination of centuries of development"
   apogee  culmination 
   
2. the decisive moment in a novel or play
   "the deathbed scene is the climax of the play"
   climax  culmination 
   
3. a concluding action
   completion  culmination  closing  windup  mop up 
   
4. (astronomy) a heavenly body's highest celestial point above an observer's horizon
   culmination