(law) An improvement to an estate that changes its character such that a holder of a future interest in the estate can recover damages against the owner who permitted the improvement to be be made, even if the change actually increases the value of the estate.

So as to ameliorate; In a manner that improves.

Serving to ameliorate or improve.

A proponent of ameliorism.

plural of ameliorist

Of or relating to ameliorism.