改定する

• Reading: かいていする
• Romaji: kaitei suru
• Kanji breakdown: 改 (kai) — reform, change; 定 (tei) — fix, determine
• Pronunciation: /ka.i.teː.sɯ.ɾɯ/

Meaning

To revise; to amend an official standard, regulation, or price.

A Group 3 (suru) verb used when officially changing rules, rates, or standards. Distinguished from 改訂 (revising written content like books) — 改定 focuses on revising systems, prices, or regulations. Common in news and business contexts.

Examples

1. 消費税の税率が来月から改定される。 The consumption tax rate will be revised starting next month.
2. 規約を改定したので、最新版を確認してください。 We have revised the terms, so please check the latest version.
3. 給与体系を改定する提案が出された。 A proposal was made to revise the salary structure.

Usage Guide

Context: business, government, regulations

Tone: formal

Origin & History

Compound of 改 (reform, change) + 定 (fix, determine). The combination conveys the idea of re-establishing or re-setting something that was previously fixed.

Cultural Context

Era: Modern

Generation: All ages

Social background: Universal