'Betterment' definitions:

Definition of 'betterment'

From: WordNet
noun
A change for the better; progress in development [syn: improvement, betterment, advance]
noun
An improvement that adds to the value of a property or facility
noun
The act of relieving ills and changing for the better [syn: amelioration, melioration, betterment]

Definition of 'Betterment'

From: GCIDE
  • Betterment \Bet"ter*ment\, n.
  • 1. A making better; amendment; improvement. --W. Montagu. [1913 Webster]
  • 2. (Law) An improvement of an estate which renders it better than mere repairing would do; -- generally used in the plural. [U. S.] --Bouvier. [1913 Webster]