Meaning of the word "a feather in your cap" in English

What does "a feather in your cap" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a feather in your cap

US /ə ˈfɛðər ɪn jʊər kæp/
UK /ə ˈfɛðər ɪn jɔː kæp/
"a feather in your cap" picture

Idiom

an achievement to be proud of

Example:
Winning that award was truly a feather in her cap.
Completing the marathon was a feather in his cap, even though he didn't win.