[, ]a product that has sold very well so that there are none left; an event for which all the tickets have been sold 售完；脱销◆The book was a sell-out. 那本书已卖完。◆We had a sell-out season in December (= we sold all our stock of many items). 十二月份我们许多货物都卖光了。◆a sell-out tour 预订一空的旅游路线➡sell out; sell out (of sth) at sell verb