What is the difference between an illustrator and a graphic designer?

Basically, Graphic Design is meant to be done on printed media in order to advertise or spread a brand, for example. Graphic Design works with illustration, layout, visual identity and the like to produce folders, business cards, envelopes, outdoors, wall advertisements, magazine ads, etc. Animation is nowadays generally developed for digital medias, and there are basically two types of animation (in general terms) 2D and 3D Animation. There are other techniques of animation such as Flip Books (consisting of drawing in several pages in a row), Stop-motion (pictures of an action in different positions and played in enough frames per second to look like a real movement), and many more. 2D Animation for digital media generally consists of Drawing many times the same scene in several sequenced positions and play them in enough frames per second to look like a movement. 3D Animation need 3D objects to be modeled previously, than, after some proper technical adjustments, animates the movement of such objects through several 3D softwares, such as XSI, Maya, and many others. Please, note that this is a general explanation was made for laymen.