What is Foreshortening?
In terms of drawing Foreshortening means representing an object in a picture in depth. When a line, form or object etc is represented shorter than actual in order to give it an illusion of recession, it is termed as Foreshortening.
Take for example, a standing man and view his image from the front. Now imagine that this standing man is falling a little backwards. In terms of perspective, his head will appear farther than his foot. To create this illusion, the technique that is applied by shortening his head and making a bigger foot is termed as Foreshortening.
Thus Foreshortening is a form of art when the object you see seems compressed and shortened and brings out illusionary depth.