(idiomatic) An accomplishment; particularly one that is flaunted or boasted of.
He thinks it is quite a feather in his cap that he figured it out for himself.
Other Word Forms of Feather-in-one-s-cap
Plural:feathers in one's cap
Origin of Feather-in-one-s-cap
From the reported American Indian warrior custom of adding a feather to the head-dress after each kill.
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