improving

The act of making improvement.

Tending to cause improvement; affording means or occasion of improvement; that may be used to advantage.

In metallurgy, an operation for removing a portion of the impurities from argentiferous lead by exposing the molten metal to the oxidizing influence of the air.

Tending to improve, beneficial; growing better.

an extended lease to induce the tenant to make improvements on the premises.

getting better

Present participle of improve.

getting higher or more vigorous