Revision
Amendment, Alteration
noun, verbal noun, の adjective
Renew and make something correct. When you do this, you are doing a revision, amendment or alteration. Ah, much better now.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
四月から、JR山手線のダイヤが改正されます。
The schedule for the JR Yamanote Line will be revised in April.
インターネットの改正料金、もうチェックしましたか？
Have you checked the revised Internet rates?
その市民団体は、公共の場でオナラを禁止する法の改正を求めました。
The civic group called for a change in the law that bans farting in public places.