noun (n)

• a change for the better; progress in development

  berubah menjadi lebih baik; kemajuan dalam pembangunan

  Synonym:
  advance, betterment
  

  source: wordnet30
• the act of improving something

  tindakan meningkatkan sesuatu

  Example:
  Their improvements increased the value of the property.
  

  source: wordnet30
• a condition superior to an earlier condition

  kondisi superior kondisi awal

  Example:
  The new school represents a great improvement.
  

  Synonym:
  melioration
  Antonym:
  declination, decline
  

  source: wordnet30
• The act of improving; advancement or growth; promotion in desirable qualities; progress toward what is better; melioration; as, the improvement of the mind, of land, roads, etc.

  tindakan meningkatkan; kemajuan atau pertumbuhan; promosi di diinginkan kualitas; kemajuan ke arah yang lebih baik; melioration; sebagai, i perbaikan/ aku dari pikiran, tanah, jalan, dll.

  source: webster1913