If you think about the phrase "designer" in its wider sense it's always an occupation that's multidisciplinary by the nature of the gig. It doesn't matter what type of design you are (industrial, graphic, fashion, etc.) because you are always working with people outside of your profession. Many people think of a designer as someone on a mountaintop who is going after "a vision" -- well that's real a fine artist.

Designers on the other hand are always about making something for an end purpose, and something that NEEDS to please an audience (be a client or end-consumer). Design should be style thrown on top of engineering -- that's decoration, which isn't what designers do. Designer solve problems, tell stories and give their creations personalities.