Definition
Without having seen something before making a decision or commitment.
未看先买
They bought the house sight unseen, which is unbelievable.
他们在没有看过房子的情况下就买下了，真是难以置信。
I would never buy a used car sight unseen.
我绝对不会在没看过车的情况下买二手车。
She agreed to buy the dress sight unseen because she trusted the seller's description.
她同意在没看过裙子的情况下购买，因为她信任卖家的描述。