Select the most appropriate meaning of the underlined idiom.

Ron added a feather in his cap by winning that international tournament.

An achievement to be proud of

The most appropriate meaning of the underlined idiom in the given sentence is an achievement to be proud of.

The idiom "to add a feather in one's cap" is used to describe an achievement that someone is proud of. It is thought to have originated from the idea that feathers were used as decorations for hats, and so adding a feather to one's cap would be seen as a sign of accomplishment.

In the given sentence, Ron won an international tournament, which is a great achievement. He can be proud of himself for winning the tournament, and he can add this achievement to his list of accomplishments.

The other options are not accurate descriptions of the meaning of the idiom.

• To feel well and healthy: This idiom is more accurately described as "to be in good health."
• To take advantage of one's position: This idiom is more accurately described as "to use one's position to benefit oneself."
• An expression of extreme annoyance: This idiom is not related to the idiom "to add a feather in one's cap."