A piece of furniture with shelves or compartments for storing dishes, tableware, and sometimes food items. Common in kitchens and dining rooms.
I bought a new cupboard and arranged the plates neatly.
I keep the coffee maker on top of the sideboard.
Compound of 食器 (shokki, 'tableware') and 棚 (tana/dana, 'shelf'). The reading しょっきだな reflects rendaku voicing of たな to だな.