Adjective improved has 3 senses
  1. improved - made more desirable or valuable or profitable; especially made ready for use or marketing; "new houses are springing up on an improved tract of land near the river"; "an improved breed"
    unimproved, dirt, ungraded, scrub, undeveloped
  2. improved - become or made better in quality; "was proud of his improved grades"; "an improved viewfinder"
    worse (indirect, via better)
  3. improved - (of land) made ready for development or agriculture by clearing of trees and brush; "improved farmlands"
    uncleared (indirect, via cleared)
,Verb improve has 2 senses
  1. better, improve, amend, ameliorate, meliorate - to make better; "The editor improved the manuscript with his changes"
    --1 is one way to change, alter, modify
    Derived forms: noun improvement1, noun improver1, noun improver2
    Sample sentence:
    They improve their earnings this year
  2. better, improve, ameliorate, meliorate - get better; "The weather improved toward evening"
    --2 is one way to change state, turn
    Derived forms: noun improvement3, noun improvement2
    Sample sentence:
    Their earnings improve this year