from
The Collaborative International Dictionary of English v.0.48
Improve \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.
[1913 Webster]
We take care to improve in our frugality and
diligence. --Atterbury.
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2. To advance or progress in bad qualities; to grow worse.
"Domitian improved in cruelty." --Milner.
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3. To increase; to be enhanced; to rise in value; as, the
price of cotton improves.
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{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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