What does 礼状 mean?
礼状 is a Japanese noun meaning “letter of thanks, thank-you note” in English. It is written as 礼状 in kanji, れいじょう in hiragana, and reijou in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
あなたは彼らにお礼状を書くべきだと思いませんか。
Don't you think you ought to write them a thank-you note?