- improve [im pro͞ov′]vt.improved, improving [earlier improw < Anglo-Fr emprower < en-, in + prou, gain, advantage < LL prode, advantage (back-form. < L prodesse, to be of advantage): see PRO-2 & IS1]1. Now Rare to use profitably or to good advantage [to improve one's leisure by studying]2. to raise to a better quality or condition; make better☆ 3. to make (land or structures) more valuable by cultivation, construction, etc.vi.to become better in quality or condition——————improve on or improve uponto do or make better than, as by additions or changesimprovabilityn.improvableadj.improvern.SYN.- IMPROVE and BETTER1 both imply a correcting or advancing of something that is not in itself necessarily bad, the former by supplying a lack or want [to improve a method ] and the latter by seeking something more satisfying [he's left his job to better himself ]; AMELIORATE implies a bad, oppressive, or intolerable condition to begin with [to ameliorate the lot of the poor ] -ANT. WORSEN, IMPAIR
English World dictionary. V. Neufeldt. 2014.