Beyond being innovative, sensible, useful, aesthetically pleasing, straightforward, discreet, durable, detailed, relevant and, nowadays, earth-friendly—the words that come to mind when I try to define good design—good design is good business. And common sense. As Dr. Ralf Speth, the CEO of automotive giant Jaguar, noted, “If you think good design is expensive, you should look at the cost of bad design.” We want to know what it means to you, too. Let us know in 140 characters or fewer by Tweeting out your definition of good design. Make sure to tag us—@HBDChristina—and use #gooddesign.