interjection
Polite exclamation praising someone's performance or achievement. Often used in formal or respectful contexts.
See also: 見事
お見事！素晴らしい演奏でした。
Well done! That was a wonderful performance.
難しい問題を一人で解決したのか。お見事だ。
You solved that difficult problem by yourself? Well done.
見事 is the base adjective/noun meaning 'splendid' or 'magnificent'. お見事 is the polite interjection form used to praise someone directly.
Polite prefix お + 見事 (splendid, magnificent). The kanji 見事 literally means 'see' + 'thing/affair', but the compound is a set expression for something admirable.