Im·prove, v. i.
1. To grow better; to advance or make progress in what is desirable; to make or show improvement; as, to improve in health.
We take care to improve in our frugality and diligence. --Atterbury.
2. To advance or progress in bad qualities; to grow worse. “Domitian improved in cruelty.”
3. To increase; to be enhanced; to rise in value; as, the price of cotton improves.
To improve on or To improve upon, to make useful additions or amendments to, or changes in; to bring nearer to perfection; as, to improve on the mode of tillage.
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