Something graphic is visual. Graphic design is made of visual elements. A graphic novel tells its story with pictures. And a story that is too graphic is too good at showing you things that are, for example, shocking or violent.
Derived from the Greek graphikos, meaning "drawn" or "written," graphic shows up often before words such as design or art. There's debate over whether Norman Rockwell was a painter or just a graphic artist. In certain cases, usually involving loaded issues such as violence or sex, graphic means overly clear in a visual way. Gruesome slasher movies could be too graphic for some viewers, leaving them feeling sick to their stomachs.