melioration
英[?mi:lj?'re???n]
美[?milj?'re???n]
英英词典释义
Noun
1. the act of relieving ills and changing for the better
2. a condition superior to an earlier condition;
"the new school represents a great improvement"3. the linguistic process in which over a period of time a word grows more positive in connotation or more elevated in meaning