The phrase "enhanced edition" means an improved version of something that has been enhanced or made better compared to its original version. Full definition
See what you can do to enhance editions of the book sold at that location. (authormarketingclub.com)
While it was fundamentally no different from Red & Blue, the connections to the beloved anime were more than enough to make it stand out and it paved the way for the series staple of releasing enhanced editions of the initial two games of a new generation. (heavy.com)
With the launch of the Xbox One X a variety of games have come forward with enhanced editions, the latest of which is Gears of War 4. (co-optimus.com)