Graphic design, also known as communication design, is the art and practice of planning and projecting ideas and experiences with visual and textual content. The form of the communication can be physical or virtual, and may include images, words, or graphic forms. The experience can take place in an instant or over a long period of time. The work can happen at any scale, from the design of a single postage stamp to a national postal signage system, or from a company’s digital avatar to the sprawling and interlinked digital and physical content of an international newspaper. It can also be for any purpose, whether commercial, educational, cultural, or political.
Design that’s meant to be experienced in an instant is the easiest to recognize and has been around the longest. For over a hundred years, designers have arranged type, form, and image on posters, advertisements, packages, and other printed matter, as well as information visualizations and graphics for newspapers and magazines. Motion graphics are equally predetermined and crafted, but are meant to be experienced over a fixed time span, such as for the opening credits of a movie or an online video meant to accompany a newspaper article.
( Source: AIGA )