- the act of improving or the state of being improved
- something that improves, esp an addition or alteration
- (usually plural) Austral NZ a building or other works on a piece of land, adding to its value
WordReference Random House Learner's Dictionary of American English © 2015
- [uncountable] an act of improving or the state of being improved:signs of economic improvement.
- [countable] a change or addition by which a thing is improved:to make improvements on a house.