Definitions
1.NounThe act of improving; advancement or growth; a bettering
2.NounThe act of making profitable use or application of anything, or the state of being profitably employed; practical application, for example of a doctrine, principle, or theory, stated in a discourse.
3.NounThe state of being improved; betterment; advance
4.NounSomething which is improved"the new edition is an improvement on the old.; The decade has seen vast improvements in techniques."
5.NounIncrease; growth; progress; advance.
6.NounValuable additions or betterments, for example buildings, clearings, drains, fences, etc., on premises.
7.Noun(Patent Laws): A useful addition to, or modification of, a machine, manufacture, or composition.