1Looking back on and carefully thinking over one's own actions or thinking — reflection or introspection aimed at improving how one does things.
ミスをした後で、原因を反省して対策を立てた。
After making a mistake, I reflected on the cause and worked out countermeasures.
毎晩、寝る前にその日の行動を反省するようにしている。
I make a point of reflecting on the day's actions every night before bed.
会議では過去の失敗を反省し、改善点を話し合った。
At the meeting, we reflected on past failures and discussed areas for improvement.
2Feeling regret or remorse over one's own mistakes or words, usually accompanied by an apology or a resolve to change.
彼は自分の無神経な発言を深く反省して謝った。
He deeply regretted his insensitive remark and apologized.
反省の色が見えない態度に、上司はさらに厳しく注意した。
Seeing no sign of remorse in his attitude, the boss reprimanded him even more sternly.
謝るだけでなく、反省して行動を変えることが大事だ。
It's important not just to apologize, but to genuinely reflect and change your behavior.