Out of stock means sold out, with the shelf empty until the next delivery. Currently out of stock, went out of stock, out of stock again.
It says nothing about whether the thing will return, which is why shops add temporarily or discontinued to make that clear. Online it is the most-read phrase in retail after the price.
1phraseout of stockSold out — the shelf is empty until the next delivery.
“Every size worth having was out of stock by lunchtime.”
out of stock is a phrase.
Practised in Shopping & Money