melioration

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

An improvement.

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

The act or process of making or becoming better; improvement; amelioration.

plural In Scots law, improvements made by a tenant upon the property which he rents, and for which he is in certain cases entitled to compensation from the landlord.

The act or operation of meliorating, or the state of being meliorated; improvement.

An improvement, betterment or amelioration

The process in which a term gains a more positive connotation over time

the act of relieving ills and changing for the better