"Overall betterment" refers to making improvements or progress in all aspects or areas of something or someone. It means enhancing or advancing every aspect collectively, rather than focusing on one specific area only. Full definition
The movie can best be described as an apocalyptic «Grown Ups» with better casting, better writing, better acting and overall betterment on all fronts. (thefilmyap.com)
Let our Gooners play in their best spot for the overall betterment of the team! (justarsenal.com)
The L.W. Calderwood Officer of the Year award recognizes outstanding officers for significant contributions toward the overall betterment of the community. (articles.chicagotribune.com)