Sell out Definition 1 of 3Pro Tip 1/3Popularity Indicator Used when items are quickly bought, showing high demand or popularity. The new sneakers sold out in minutes! Pro Tip 2/3Limited Availability Implies that no more items are left to buy, often temporarily. Sorry, our special edition book has sold out. Pro Tip 3/3No Reservations Affirms tickets or products cannot be reserved as they're completely gone. The play sold out so fast, I couldn't even reserve a seat.