IMPROVEMENT

[noun]The last year has seen a slight improvement in the economy. [C]He works for a company who do home improvements. [C]These white walls are a big improvement on that disgusting old wallpaper. [C]Unless there's an improvement in the weather we won't be going out today. [C]He's been having treatment for two months now without any improvement. [U]On my school reports teachers always used to write 'room for improvement' (= could be better). [U]