improvement
1. [ noun ] a change for the better; progress in development
Synonyms: advance betterment
Related terms: transformation adjustment recovery conservation refinement revival promote better
2. [ noun ] the act of improving something
Examples:

: "Their improvements increased the value of the property"

Related terms: change_of_state development cleaning modernization repair reform ventilation correction amelioration renovation enrichment optimisation upturn stabilisation clearing self-improvement tenderization humanization enhancement upgrade perfection better
3. [ noun ] a condition superior to an earlier condition
Synonyms: melioration
Examples:

: "the new school represents a great improvement"

Related terms: decline condition development reformation renovation betterment better
Similar spelling:   improvident
  improvidently
  improver
  improved
  impressment
  improvize
  improvise
  improving
  impromptu
  improvable
  imprisonment
  imprudent
  improvidence
  improvisation