—v.t. 1. to bring into a more desirable or excellent condition: He took vitamins to improve his health. 2. to make (land) more useful, profitable, or valuable by enclosure, cultivation, etc.
3. to increase the value of (real property) by betterments, as the construction of buildings and sewers.
4. to make good use of; turn to account: He improved the stopover by seeing a client with offices there.
—v.i. 1. to increase in value, excellence, etc.; become better: The military situation is improving. 2. to make improvements, as by revision, addition, or change: None of the younger violinists have been able to improve on his interpretation of that work.