What does 当人 mean?
当人 is a Japanese noun meaning “the one concerned, the said person” in English. It is written as 当人 in kanji, とうにん in hiragana, and tounin in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
当人のいないところで悪口を言うべきでない。
You shouldn't speak ill of a man behind his back.