noun, noun or participle which takes 'suru', transitive verb
repair; renovation; improvement
Used for systematic repair, renovation, or improvement of facilities, buildings, roads, and systems. Often implies a planned project rather than a quick fix.
市は老朽化した橋の改修工事を来月から始める。
The city will start renovation work on the aging bridge next month.
This software needs to be patched to fix security issues.