· a change for the better; progress in development
Synonym(s): betterment, advance
Hypernym(s): transformation, transmutation, shift
· the act of improving something; "their improvements increased the value of the property"
Hypernym(s): change_of_state
· a condition superior to an earlier condition; "the new school represents a great improvement"
Synonym(s): melioration
Hypernym(s): condition, status
Antonym(s): decline