IMPROVE

[verb] - to (cause something to) get betterHe did a lot to improve conditions for factory workers. [T]The only way to improve my French was by living in France for a while. [T]If the situation at home doesn't improve soon, I'll have to move out. [I]Even more handsome at fifty than at twenty, his looks just improved with age. [I]Her health has improved dramatically since she started on this new diet. [I]If you improve on/upon something, esp. something that has already been achieved, you succeed in doing better than it.Last time she ran the race in twenty minutes, so she's hoping to improve on that.