The phrase "dusty shelf" means a shelf or storage area that is covered in a layer of dirt or accumulated dust because it has not been used or cleaned for a long time. Full definition
+ Art collectors seem to be donating their works to smaller nonprofits — think: hospitals, nursing homes, and libraries — rather than museums, where pieces stand a greater risk to slip onto dusty shelves and into obscurity. (creators.vice.com)
Explore hidden gems along dusty shelves before curling up in a tub chair or window seat whilst someone gently hums at the piano in the distance. (idealhome.co.uk)
They take up practically no space whatsoever on any hard drive, meaning you don't have to file them away on dusty shelves, destined never to be opened again once you have read them. (angiesdiary.com)