The state of an item being out of stock (not available in store or warehouse); commonly shown as 'out of stock' in shops or online.
その色は人気で、既に在庫切れだ。
That color is popular and already out of stock.
注文したら在庫切れで発送が遅れると言われた。
When I ordered, I was told it was out of stock and shipping would be delayed.
商品ページに『在庫切れ』と表示されている。
The product page shows 'out of stock'.