Supplies or goods bought in advance and kept on hand (reserve stock); spare items kept for future use.
冷蔵庫に牛乳の買い置きがある。
There is a spare carton of milk in the fridge.
災害に備えて買い置きしておくと安心だ。
It's reassuring to keep supplies in reserve for disasters.
毎週、買い置きを確認してから買い物に行く。
Every week I check my reserves before I go shopping.