cupboard

cupboard /ˈkʌbɚd/ noun
plural cupboards
cupboard
/ˈkʌbɚd/
noun
plural cupboards
Britannica Dictionary definition of CUPBOARD
[count]
1 
: a piece of furniture used for storage that has doors and contains shelves — see picture at kitchen
2 
US : a small room with shelves where you keep cups, dishes, or food
3 
British : a small room where things are stored : closet

skeleton in the/your cupboard

— see 1skeleton