melioration

Definition of Melioration in English :

the act of relieving ills and changing for the better

2. improvement, melioration

a condition superior to an earlier condition

Example Sentences:
'the new school represents a great improvement'

3. melioration

the linguistic process in which over a period of time a word grows more positive in connotation or more elevated in meaning

WordNet Lexical Database for English. Princeton University. 2010.

Melioration

noun

the act or an instance of improving or the state of being improved

noun

1.

a meliorating or being meliorated; improvement

2. Linguistics

the process by which the meaning or connotation of a word becomes more positive

n.

1.

a. The act or process of improving something or the state of being improved.

b. An improvement.

2. The linguistic process by which a word over a period of time grows more elevated in meaning or more positive in connotation.