melioration

n. improvement

Amelioration may refer to one of the following.Amelioration (health) means "to make better" or "to improve upon" most often in context of or in reference to ill health of a person but could also be in reference to healing the land, plant, tree, etc.Land amelioration (land improvement)Amelioration (semantic) is a form of semantic change, the introduction of positive connotations or removal of negative ones for a word or expression.
See more at Wikipedia.org...

Noun
1. the act of relieving ills and changing for the better
(synonym) amelioration, betterment
(hypernym) improvement
(derivation) better, improve, amend, ameliorate, meliorate
2. a condition superior to an earlier condition; "the new school represents a great improvement"
(synonym) improvement
(hypernym) condition, status
(hyponym) betterment
(derivation) better, improve, amend, ameliorate, meliorate
3. the linguistic process in which over a period of time a word grows more positive in connotation or more elevated in meaning
(hypernym) drift
(derivation) better, improve, ameliorate, meliorate

n. melioration, improvement, state of being made better

n. melioration, improvement