What does the idiom/phrase "feather in one's cap" mean?

  1. a decoration
  2. a light task
  3. an achievement to be proud of
  4. a sign of weakness
Answer

C) an achievement to be proud of

An honour. Idioms & Idiomatic Phrases · Common idioms

English MCQ · More English: Idioms & Idiomatic Phrases MCQs · Practise