WordWeb Online

1. Getting higher or more vigorous
   "an improving economy"
   - up

1. To make better
   "The editor improved the manuscript with his changes"
   - better, amend, ameliorate, meliorate
    
2. Get better
   "The weather improved toward evening"
   - better, ameliorate, meliorate

See also: improvement, improver, rising

Type of: alter, change, change state, modify, turn

Encyclopedia: Improve