can Graffiti be art or history?

Before I can give my opinion on this question I must first define the word “art”. Art is defined on the global internet as “The expression or application of human creative skill and imagination, typically in a visual form such as painting or sculpture”. And as we see from the video by Barry McGee and Margaret Kilgallen, when one does graffiti they express their thoughts and emotions so that the world may see. Graffiti isn’t just words on a wall. It is showing the artist past experience, struggles and triumph through  out life. Graffiti is almost similar to relief works in such a way that they are both drawn on straight walls with the exemption that reliefs are shown out slightly more. In my opinion anything may be art, whether it is a line a do or just shades of color, once the pencil is used on paper it has now became art.