To make better; to improve; to meliorate.

1. To get better; SYN. improve, ameliorate, meliorate.
2. To surpass in excellence; SYN. break.
3. To make better in quality or more valuable; SYN. improve, amend, ameliorate, meliorate.

1. To increase; SYN. heighten, raise.
2. To make better or more attractive.

ETYM Pref. im- not + prove: cf. Latin improbare, French improuver.
1. To make better.
2. To develop by construction or renovation.

To make better; to improve; to ameliorate; to soften; to make more tolerable.

To make smart or spruce; -- usually with up

1. To rate higher; raise in value or esteem.
2. To improve, esp. something that was old or outdated.