improvement
Concise Oxford English Dictionary © 2008 Oxford University Press:
improvement/ɪmˈpruːvmənt/
▶noun an instance of improving or being improved.
■ the action of improving or being improved.
■ a thing that improves something or is better than something else: home improvements.
'improvement' also found in these Oxford entries:
advance
- advancement
- amendment
- betterment
- chaptalization
- decided
- edifying
- feedback
- kaizen
- pickup
- refinement
- rehash
- relapse
- research and development
- revival
- room
- self-improvement
- step change
- upturn
- zip code

