crowning achievement(redirected from one's crowning achievement)
The most important, significant, or excellent accomplishment or moment of one's career or life. The author's oeuvre spans five novels, four plays, and six books of poetry, but this, her final novel, is by far her crowning achievement. I may have had success in business and led a somewhat romantic life, but my crowning achievement was by far the day I became a father.
See also: crown
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.