Industrial design is what makes a man-made object, a connected-to-man object. It's what makes a product's function apparent, and it's use intuitive. It's what makes people desire it over a similar product. It's what makes the product feel good to use, and something of beauty and elegance. It creates a perceived sense of value.
Industrial design is more than art. It's data collection, human factors, creative exploration within logical constraints, and integration of individual components into a unified form. And finally, the art of seeing the beauty that lies within that form, and bringing it forward for all to see.
Industrial design also includes the ability to communicate design concepts with drawings, images, and models, understandable by people of widely varied disciplines.