The kanji character 訂 primarily conveys the meaning of "to correct," "to revise," "to amend," or "to rectify" something, particularly written or formal materials. It implies making changes to improve accuracy or clarity. This can also refer to making reservations or orders.

・On-yomi (音読み): テイ (tei) ・Kun-yomi (訓読み): ただ（す） (tada(su)) - This is a verb and it means "to correct".

⚫︎訂正 (ていせい) Translation: Correction; revision; amendment ⚫︎訂正する (ていせいする) Translation: To correct; to revise; to amend ⚫︎ご予約の変更・訂正 Translation: Changes/Corrections to your reservation

The kanji 訂 is a phono-semantic compound (形声文字 - keisei moji). The left side is a radical called 言 (げん - gen), meaning "speech" or "words," indicating it has something to do with language. The right side is a phonetic component 丁 (てい - tei), which provides the sound and possibly hints at the original meaning related to "nailing down" or "fixing." Together, these components convey the idea of "correcting" or "fixing" written or spoken words.