When you call something dustborn, it's either literally covered in dust or so old and unoriginal that it might as well be. You can use a feather duster to clean off dusty surfaces, but if something is a dusty color, that just means it's got a grayish tint to it, like dusty pink or dusty blue. If something has been around for a really long time and it's worn-out, stale, or unoriginal, you can also call it dusty. If you're a stand up comedian whose been working the same act for thirty years, chances are your jokes are getting a little dusty. As the Tillermans, breathing in gasps, were passing the playground, a dusty green pickup swung into the road that circled before the school entrance. Sunlight floods a dusty space with nests of cobwebs in the corners. They became explorers, rushed around hoping the next clump of dusty trees or chunk of wall might reveal the treasure, the trinket, the exotically rusted hinge.