1.nounA board or table used to openly hold and display silver plate and other dishware; a sideboard; a buffet.
2.nounThings displayed on a sideboard; dishware, particularly valuable plate.
3.nounA cabinet, closet, or other piece of furniture with shelves intended for storing cookware, dishware, or food; similar cabinets or closets used for storing other items.
"Put the cups back into the cupboard."
4.nounThings stored in a cupboard; particularly food.