cul ‧ mi ‧ na ‧ tion /ˌkʌlməˈneɪʃ ə n, ˌkʌlmɪˈneɪʃ ə n/ BrE AmE noun [uncountable]
the culmination of something something, especially something important, that happens at the end of a long period of effort or development:
This little book represented the culmination of 15 years’ work.