"Cupboard doors" refers to the hinged panels or covers that close off the opening of a cupboard or cabinet, allowing you to store things inside and keep them hidden from view. Full definition
See, you probably hadn't thought of using the back of cupboard doors but knowing this will suddenly provide you with plenty of storage opportunities. (mummymummymum.com)
Speaking of appliances, I thought it was pretty neat how these were disguised behind cupboard doors. (mommyniri.com)
Learn how to easily secure cupboard doors with some simple child catches. (bunnyproof.com)