crowning
adj.adj. describing the best or most important part of something that has already been successful. It is like the final prize at the end of a long journey.
adj. representing the greatest or most significant achievement in a series of events. Typically used attributively to describe a final, climactic success.
Winning the gold medal was the crowning moment of her career.
The architect considered the new library to be the crowning achievement of his forty-year professional life.
After decades of diplomatic tension, the signing of the peace treaty served as the crowning glory of the administration's foreign policy efforts.
From Middle English crowninge, crounende, equivalent to crown + -ing.
From Middle English crouninge, crounynge, coroning, coronyng, equivalent to crown + -ing.
Typically used attributively before a noun like 'achievement', 'moment', or 'glory'.