What is the meaning of Ameliorative?

Able to repair or ameliorate.

Suggesting or relating to a positive or approving evaluation.

Of or relating to conceptual engineering, the normative study of which conceptual demarcation is most conducive to solve the problems the concept is a priori taken to solve.

That which betters or improves.

A linguistic unit (such as a word, morpheme) that implies a positive or approving evaluation.

Source: wiktionary.org