The meaning of improve is to enhance in value or quality : How to use improve in a sentence. See examples of improve used in a sentence.
If you improve on a previous achievement of your own or of someone else, you achieve a better standard or result. We need to improve on our performance against france. Phrasal verb improve on/upon something (definition of improve from the cambridge advanced learner's dictionary & thesaurus © cambridge university press)
When you improve something, you make it better. For example, you can improve your harmonica playing with practice. Definition of improve verb in oxford advanced american dictionary.
Improve, ameliorate, better imply bringing to a more desirable state. Improve usually implies remedying a lack or a felt need: To improve a process, oneself (as by gaining more knowledge).
Improve on/upon [phrasal verb] improve on/upon (something) :
