HD pictures are in high definition, whereas regular pictures are not. As such, HD (or high definition) pictures look a lot better because they contain more pixels.
Depending on the context it may be no difference at all. There are some minor differences (nuances): - Graphic refers also to things like paintings. - Picture is associated with photography more than...
Quality photo stores, usually the ones that sell the really nice cameras, lenses, and accessories, can usually print off your film in HD. Another option for you may be to look for professional film...